| 4 | 
            
              Open Document
              
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            Open Filing | 
            PRIMARY DOCUMENT | 
            Jul 9, 2024 | 
            Jun 28, 2024 | 
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            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
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            Jul 9, 2024 | 
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            005-38473 | 
          
          
            | 15-12G | 
            
              Open Document
              
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            Open Filing | 
            FORM 15-12G | 
            Jul 9, 2024 | 
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            001-38838 | 
          
          
            | EFFECT | 
            
              Open Document
              
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            Open Filing | 
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            Jul 2, 2024 | 
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            333-46755 | 
          
          
            | EFFECT | 
            
              Open Document
              
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            Open Filing | 
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            Jul 2, 2024 | 
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            333-260152 | 
          
          
            | S-8 POS | 
            
              Open Document
              
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            Open Filing | 
            POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 | 
            Jun 28, 2024 | 
             | 
            333-47531 | 
          
          
            | S-8 POS | 
            
              Open Document
              
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            Open Filing | 
            POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 | 
            Jun 28, 2024 | 
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            333-251455 | 
          
          
            | POS AM | 
            
              Open Document
              
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            Open Filing | 
            POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-3 | 
            Jun 28, 2024 | 
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            333-46755 | 
          
          
            | POS AM | 
            
              Open Document
              
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            Open Filing | 
            POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-3 | 
            Jun 28, 2024 | 
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            333-260152 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
            AMENDMENT NO. 6 TO SCHEDULE 13D | 
            Jun 28, 2024 | 
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            005-38473 | 
          
          
            | 4 | 
            
              Open Document
              
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            Jun 28, 2024 | 
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            | 4 | 
            
              Open Document
              
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            Jun 28, 2024 | 
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            | 4 | 
            
              Open Document
              
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            Jun 28, 2024 | 
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            | 4 | 
            
              Open Document
              
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            Jun 28, 2024 | 
            Jun 28, 2024 | 
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            | 4 | 
            
              Open Document
              
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            Open Filing | 
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            Jun 28, 2024 | 
            Jun 28, 2024 | 
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            | 8-K | 
            
              Open Document
              | Data
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            Open Filing | 
            CURRENT REPORT | 
            Jun 28, 2024 | 
            Jun 28, 2024 | 
            001-38838 | 
          
          
            | SC 14D9/A | 
            
              Open Document
              
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            Open Filing | 
            AMENDMENT NO. 3 TO SCHEDULE 14D-9 | 
            Jun 28, 2024 | 
             | 
            005-38473 | 
          
          
            | 25-NSE | 
            
              Open Document
              
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            Open Filing | 
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            Jun 28, 2024 | 
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            001-38838 | 
          
          
            | SC TO-T/A | 
            
              Open Document
              
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            Open Filing | 
            AMENDMENT NO. 2 TO FORM SC TO-T | 
            Jun 28, 2024 | 
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            005-38473 | 
          
          
            | SC 14D9/A | 
            
              Open Document
              
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            Open Filing | 
            AMENDMENT NO. 2 TO SCHEDULE 14D-9 | 
            Jun 24, 2024 | 
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            005-38473 | 
          
          
            | SC 14D9/A | 
            
              Open Document
              
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            Open Filing | 
            AMENDMENT NO. 1 TO SCHEDULE 14D-9 | 
            Jun 17, 2024 | 
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            005-38473 | 
          
          
            | CORRESP | 
            
              Open Document
              
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            Open Filing | 
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            Jun 14, 2024 | 
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            | SC TO-T/A | 
            
              Open Document
              
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            Open Filing | 
            AMENDMENT NO. 1 TO FORM SC TO-T | 
            Jun 14, 2024 | 
             | 
            005-38473 | 
          
          
            | UPLOAD | 
            
              Open Document
              
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            Open Filing | 
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            Jun 10, 2024 | 
             | 
            005-38473 | 
          
          
            | UPLOAD | 
            
              Open Document
              
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            Open Filing | 
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            Jun 10, 2024 | 
             | 
            005-38473 | 
          
          
            | SC 14D9 | 
            
              Open Document
              
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            Open Filing | 
            SCHEDULE 14D-9 | 
            May 30, 2024 | 
             | 
            005-38473 | 
          
          
            | SC TO-T | 
            
              Open Document
              
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            Open Filing | 
            TENDER OFFER STATEMENT | 
            May 30, 2024 | 
             | 
            005-38473 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 5 TO SCHEDULE 13D | 
            May 17, 2024 | 
             | 
            005-38473 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            May 17, 2024 | 
             | 
            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              | Data
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            Open Filing | 
            CURRENT REPORT | 
            May 17, 2024 | 
            May 15, 2024 | 
            001-38838 | 
          
          
            | SC TO-C | 
            
              Open Document
              
             | 
            Open Filing | 
            TENDER OFFER STATEMENT | 
            May 16, 2024 | 
             | 
            005-38473 | 
          
          
            | SC14D9C | 
            
              Open Document
              
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            Open Filing | 
            SCHEDULE 14D-9C | 
            May 16, 2024 | 
             | 
            005-38473 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 15, 2024 | 
            Feb 29, 2024 | 
            001-38838 | 
          
          
            | 10-Q/A | 
            
              Open Document
              | Data
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            Open Filing | 
            AMENDMENT NO. 1 TO FORM 10-Q | 
            Apr 12, 2024 | 
            Aug 31, 2023 | 
            001-38838 | 
          
          
            | 4/A | 
            
              Open Document
              
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            Open Filing | 
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            Feb 2, 2024 | 
            Jan 29, 2024 | 
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            | 4 | 
            
              Open Document
              
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            Open Filing | 
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            Jan 31, 2024 | 
            Jan 29, 2024 | 
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            | 4 | 
            
              Open Document
              
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            Open Filing | 
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            Jan 31, 2024 | 
            Jan 29, 2024 | 
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            | 4 | 
            
              Open Document
              
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            Open Filing | 
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            Jan 31, 2024 | 
            Jan 29, 2024 | 
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            | 4 | 
            
              Open Document
              
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            Open Filing | 
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            Jan 31, 2024 | 
            Jan 29, 2024 | 
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            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
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            Jan 31, 2024 | 
            Jan 29, 2024 | 
             | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Jan 11, 2024 | 
            Nov 30, 2023 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            CURRENT REPORT | 
            Dec 8, 2023 | 
            Dec 7, 2023 | 
            001-38838 | 
          
          
            | DEF 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            DEFINITIVE PROXY STATEMENT | 
            Nov 3, 2023 | 
            Dec 7, 2023 | 
            001-38838 | 
          
          
            | PRE 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            PRELIMINARY PROXY STATEMENT | 
            Oct 30, 2023 | 
            Oct 30, 2023 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            CURRENT REPORT | 
            Oct 27, 2023 | 
            Oct 27, 2023 | 
            001-38838 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Oct 11, 2023 | 
            Aug 31, 2023 | 
            001-38838 | 
          
          
            | 10-K/A | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            AMENDMENT NO. 1 TO FORM 10-K | 
            Sep 22, 2023 | 
            May 31, 2023 | 
            001-38838 | 
          
          
            | 10-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            ANNUAL REPORT | 
            Aug 11, 2023 | 
            May 31, 2023 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            CURRENT REPORT | 
            Aug 2, 2023 | 
            Jul 31, 2023 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            CURRENT REPORT | 
            Apr 26, 2023 | 
            Apr 24, 2023 | 
            001-38838 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 11, 2023 | 
            Feb 28, 2023 | 
            001-38838 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
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            Feb 1, 2023 | 
            Jan 30, 2023 | 
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            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
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            Feb 1, 2023 | 
            Jan 30, 2023 | 
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            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Jan 10, 2023 | 
            Nov 30, 2022 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            CURRENT REPORT | 
            Nov 30, 2022 | 
            Nov 30, 2022 | 
            001-38838 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
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            Nov 18, 2022 | 
            Nov 17, 2022 | 
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            | 4 | 
            
              Open Document
              
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            Open Filing | 
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            Nov 15, 2022 | 
            Nov 14, 2022 | 
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            | DEF 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            DEFINITIVE PROXY STATEMENT | 
            Oct 31, 2022 | 
            Nov 30, 2022 | 
            001-38838 | 
          
          
            | PRE 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            PRELIMINARY PROXY STATEMENT | 
            Oct 24, 2022 | 
            Oct 24, 2022 | 
            001-38838 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Oct 11, 2022 | 
            Aug 31, 2022 | 
            001-38838 | 
          
          
            | 10-K/A | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            AMENDMENT NO. 1 TO FORM 10-K | 
            Sep 16, 2022 | 
            May 31, 2022 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            CURRENT REPORT | 
            Sep 13, 2022 | 
            Sep 12, 2022 | 
            001-38838 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Aug 22, 2022 | 
            Aug 19, 2022 | 
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            | 10-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            ANNUAL REPORT | 
            Aug 15, 2022 | 
            May 31, 2022 | 
            001-38838 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 11, 2022 | 
            Feb 28, 2022 | 
            001-38838 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 1, 2022 | 
            Jan 28, 2022 | 
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            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 1, 2022 | 
            Jan 28, 2022 | 
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            | 4 | 
            
              Open Document
              
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            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 1, 2022 | 
            Jan 28, 2022 | 
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            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 1, 2022 | 
            Jan 28, 2022 | 
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            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Jan 10, 2022 | 
            Nov 30, 2021 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            CURRENT REPORT | 
            Dec 21, 2021 | 
            Dec 1, 2021 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            CURRENT REPORT | 
            Nov 30, 2021 | 
            Nov 30, 2021 | 
            001-38838 | 
          
          
            | DEF 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            DEFINITIVE PROXY STATEMENT | 
            Nov 4, 2021 | 
            Nov 30, 2021 | 
            001-38838 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Oct 28, 2021 | 
            Oct 26, 2021 | 
             | 
          
          
            | EFFECT | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Oct 26, 2021 | 
             | 
            333-260152 | 
          
          
            | PRE 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            PRELIMINARY PROXY STATEMENT | 
            Oct 25, 2021 | 
            Oct 25, 2021 | 
            001-38838 | 
          
          
            | CORRESP | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Oct 22, 2021 | 
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             | 
          
          
            | UPLOAD | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Oct 18, 2021 | 
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            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            FORM 10-Q | 
            Oct 13, 2021 | 
            Aug 31, 2021 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Oct 8, 2021 | 
            Oct 8, 2021 | 
            001-38838 | 
          
          
            | S-3 | 
            
              Open Document
              
             | 
            Open Filing | 
            REGISTRATION STATEMENT | 
            Oct 8, 2021 | 
             | 
            333-260152 | 
          
          
            | 8-K/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 2 TO FORM 8-K | 
            Oct 5, 2021 | 
            Feb 28, 2020 | 
            001-38838 | 
          
          
            | 10-K/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 1 TO FORM 10-K | 
            Sep 28, 2021 | 
            May 31, 2021 | 
            001-38838 | 
          
          
            | 10-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            ANNUAL REPORT | 
            Aug 23, 2021 | 
            May 31, 2021 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Jul 9, 2021 | 
            Jul 7, 2021 | 
            001-38838 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Jun 17, 2021 | 
            Jun 16, 2021 | 
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            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            May 28, 2021 | 
            May 26, 2021 | 
             | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            May 26, 2021 | 
            May 26, 2021 | 
            001-38838 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            May 25, 2021 | 
            May 24, 2021 | 
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            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
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            May 24, 2021 | 
            May 21, 2021 | 
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            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
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            May 19, 2021 | 
            May 17, 2021 | 
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            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            May 19, 2021 | 
            May 17, 2021 | 
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            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Apr 29, 2021 | 
            Apr 27, 2021 | 
             | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 14, 2021 | 
            Feb 28, 2021 | 
            001-38838 | 
          
          
            | 8-A12B/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 1 TO FORM 8-A | 
            Apr 1, 2021 | 
             | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Apr 1, 2021 | 
            Mar 31, 2021 | 
            001-38838 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
            SC 13D/A | 
            Feb 22, 2021 | 
             | 
            005-38473 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Feb 4, 2021 | 
            Feb 3, 2021 | 
             | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Feb 4, 2021 | 
            Feb 3, 2021 | 
             | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Feb 4, 2021 | 
            Feb 4, 2021 | 
            001-38838 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Feb 3, 2021 | 
            Feb 1, 2021 | 
             | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 1, 2021 | 
            Jan 28, 2021 | 
             | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 1, 2021 | 
            Jan 28, 2021 | 
             | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 1, 2021 | 
            Jan 28, 2021 | 
             | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERHIP DOCUMENT | 
            Feb 1, 2021 | 
            Jan 28, 2021 | 
             | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 1, 2021 | 
            Jan 28, 2021 | 
             | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Feb 1, 2021 | 
            Jan 28, 2021 | 
            001-38838 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Jan 25, 2021 | 
            Jan 21, 2021 | 
             | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Jan 19, 2021 | 
            Nov 30, 2020 | 
            001-38838 | 
          
          
            | NT 10-Q | 
            
              Open Document
              
             | 
            Open Filing | 
            NOTIFICATION OF LATE FILING | 
            Jan 14, 2021 | 
            Nov 30, 2020 | 
            001-38838 | 
          
          
            | S-8 | 
            
              Open Document
              
             | 
            Open Filing | 
            REGISTRATION STATEMENT | 
            Dec 18, 2020 | 
             | 
            333-251455 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Nov 23, 2020 | 
            Nov 19, 2020 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Nov 6, 2020 | 
            Nov 3, 2020 | 
            001-38838 | 
          
          
            | ARS | 
            
              Open Document
              
             | 
            Open Filing | 
            ANNUAL REPORT TO SECURITY HOLDERS | 
            Oct 28, 2020 | 
            May 31, 2020 | 
            001-38838 | 
          
          
            | DEF 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            DEFINITIVE PROXY STATEMENT | 
            Oct 26, 2020 | 
            Nov 19, 2020 | 
            001-38838 | 
          
          
            | PRE 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            PRELIMINARYPROXY STATEMENT | 
            Oct 15, 2020 | 
            Oct 14, 2020 | 
            001-38838 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Oct 13, 2020 | 
            Aug 31, 2020 | 
            001-38838 | 
          
          
            | 10-K/A | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            AMENDMENT NO. 1 TO FORM 10-K | 
            Sep 28, 2020 | 
            May 31, 2020 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Sep 2, 2020 | 
            Sep 1, 2020 | 
            001-38838 | 
          
          
            | 10-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            ANNUAL REPORT | 
            Aug 17, 2020 | 
            May 31, 2020 | 
            001-38838 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Aug 17, 2020 | 
             | 
            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Apr 17, 2020 | 
            Apr 15, 2020 | 
            001-38838 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 13, 2020 | 
            Feb 29, 2020 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Apr 6, 2020 | 
            Apr 1, 2020 | 
            001-38838 | 
          
          
            | 3 | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Mar 25, 2020 | 
            Mar 23, 2020 | 
             | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Mar 24, 2020 | 
            Mar 23, 2020 | 
            001-38838 | 
          
          
            | 8-K/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 1 TO CURRENT REPORT | 
            Mar 6, 2020 | 
            Feb 28, 2020 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Mar 5, 2020 | 
            Feb 28, 2020 | 
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            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Jan 29, 2020 | 
            Jan 27, 2020 | 
            001-38838 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
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            Open Filing | 
            QUARTERLY REPORT | 
            Jan 13, 2020 | 
            Nov 30, 2019 | 
            001-38838 | 
          
          
            | 3 | 
            
              Open Document
              
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              Open Document
              
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            CURRENT REPORT | 
            Dec 31, 2019 | 
            Dec 30, 2019 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Dec 17, 2019 | 
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              Open Document
              
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            CURRENT REPORT | 
            Dec 2, 2019 | 
            Nov 27, 2019 | 
            001-38838 | 
          
          
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              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Nov 26, 2019 | 
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            | SC 13D/A | 
            
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              Open Document
              
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            CURRENT REPORT | 
            Oct 25, 2019 | 
            Oct 21, 2019 | 
            001-38838 | 
          
          
            | 3 | 
            
              Open Document
              
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            Oct 23, 2019 | 
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            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Oct 21, 2019 | 
            Oct 21, 2019 | 
            001-38838 | 
          
          
            | 10-Q | 
            
              Open Document
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            Open Filing | 
            QUARTERLY REPORT | 
            Oct 15, 2019 | 
            Aug 31, 2019 | 
            001-38838 | 
          
          
            | ARS | 
            
              Open Document
              
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            Open Filing | 
            ANNUAL REPORT TO SECURITY HOLDERS | 
            Oct 4, 2019 | 
            May 31, 2019 | 
            001-38838 | 
          
          
            | ARS | 
            
              Open Document
              
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            Open Filing | 
            ANNUAL REPORT TO SECURITY HOLDERS | 
            Oct 4, 2019 | 
            May 31, 2018 | 
            001-38838 | 
          
          
            | DEF 14A | 
            
              Open Document
              
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            Open Filing | 
            PROXY STATEMENT | 
            Oct 1, 2019 | 
            Oct 22, 2019 | 
            001-38838 | 
          
          
            | 10-K/A | 
            
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            Open Filing | 
            AMENDMENT NO. 1 TO FORM 10-K | 
            Sep 24, 2019 | 
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            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
            SCHEDULE 13D | 
            Sep 10, 2019 | 
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            CURRENT REPORT | 
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            | SC 13D/A | 
            
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            CURRENT REPORT | 
            Sep 3, 2019 | 
            Aug 30, 2019 | 
            001-38838 | 
          
          
            | 10-K | 
            
              Open Document
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            Open Filing | 
            ANNUAL REPORT | 
            Aug 29, 2019 | 
            May 31, 2019 | 
            001-38838 | 
          
          
            | UPLOAD | 
            
              Open Document
              
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            Open Filing | 
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            | PRRN14A | 
            
              Open Document
              
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            Open Filing | 
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            Aug 15, 2019 | 
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            | UPLOAD | 
            
              Open Document
              
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              Open Document
              
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            | PRER14A | 
            
              Open Document
              
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            Open Filing | 
            REVISED PRELIMINARY PROXY STATEMENT | 
            Aug 15, 2019 | 
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            001-38838 | 
          
          
            | UPLOAD | 
            
              Open Document
              
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            Open Filing | 
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              Open Document
              
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            Open Filing | 
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            Open Filing | 
            FORM 8-K | 
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            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
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            Aug 8, 2019 | 
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            | PREC14A | 
            
              Open Document
              
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            Open Filing | 
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            Aug 7, 2019 | 
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            001-38838 | 
          
          
            | PREC14A | 
            
              Open Document
              
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            Open Filing | 
            PRELIMINARY PROXY STATEMENT | 
            Aug 6, 2019 | 
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            001-38838 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
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            Aug 2, 2019 | 
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            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            FORM 8-K | 
            Jul 25, 2019 | 
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            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            FORM 8-K | 
            Jul 19, 2019 | 
            Jul 17, 2019 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Jun 4, 2019 | 
            Jun 3, 2019 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            May 24, 2019 | 
            May 24, 2019 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            May 9, 2019 | 
            May 6, 2019 | 
            001-38838 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Apr 30, 2019 | 
            Apr 25, 2019 | 
            001-38838 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
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            Open Filing | 
            QUARTERLY REPORT | 
            Apr 12, 2019 | 
            Feb 28, 2019 | 
            001-38838 | 
          
          
            | 8-A12B | 
            
              Open Document
              
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            Open Filing | 
            FORM 8-A12B | 
            Mar 15, 2019 | 
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            001-38838 | 
          
          
            | UPLOAD | 
            
              Open Document
              
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            Open Filing | 
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            Feb 11, 2019 | 
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            | 10-Q | 
            
              Open Document
              | Data
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            Open Filing | 
            QUARTERLY REPORT | 
            Jan 11, 2019 | 
            Nov 30, 2018 | 
            000-08656 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
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            Jan 4, 2019 | 
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            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Dec 26, 2018 | 
            Dec 21, 2018 | 
            000-08656 | 
          
          
            | PRE 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            PRELIMINARY PROXY STATEMENT | 
            Dec 20, 2018 | 
            Dec 20, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Dec 7, 2018 | 
            Dec 4, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Nov 28, 2018 | 
            Nov 27, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Nov 21, 2018 | 
            Nov 14, 2018 | 
            000-08656 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
            SCHEDULE 13D/A | 
            Nov 20, 2018 | 
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            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Nov 19, 2018 | 
            Nov 16, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Nov 8, 2018 | 
            Nov 7, 2018 | 
            000-08656 | 
          
          
            | DEFA14A | 
            
              Open Document
              
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            Open Filing | 
            DEFINITIVE ADDITIONAL MATERIALS | 
            Nov 6, 2018 | 
             | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Nov 6, 2018 | 
            Nov 6, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Nov 5, 2018 | 
            Oct 16, 2018 | 
            000-08656 | 
          
          
            | DFAN14A | 
            
              Open Document
              
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            Open Filing | 
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            Nov 1, 2018 | 
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            000-08656 | 
          
          
            | DEFC14A | 
            
              Open Document
              
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            Open Filing | 
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            Nov 1, 2018 | 
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            000-08656 | 
          
          
            | PRRN14A | 
            
              Open Document
              
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            Open Filing | 
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            Oct 30, 2018 | 
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            000-08656 | 
          
          
            | UPLOAD | 
            
              Open Document
              
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            Open Filing | 
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            Oct 25, 2018 | 
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            | PREC14A | 
            
              Open Document
              
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            Open Filing | 
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            Oct 17, 2018 | 
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            000-08656 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
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            Open Filing | 
            QUARTERLY REPORT | 
            Oct 12, 2018 | 
            Aug 31, 2018 | 
            000-08656 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Oct 10, 2018 | 
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            005-38473 | 
          
          
            | DFAN14A | 
            
              Open Document
              
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            Open Filing | 
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            Oct 10, 2018 | 
             | 
            000-08656 | 
          
          
            | DEF 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            DEFINITIVE PROXY STATEMENT | 
            Sep 27, 2018 | 
            Nov 28, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Sep 20, 2018 | 
            Sep 17, 2018 | 
            000-08656 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
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            Sep 19, 2018 | 
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            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Sep 12, 2018 | 
            Sep 12, 2018 | 
            000-08656 | 
          
          
            | 3 | 
            
              Open Document
              
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            Open Filing | 
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            Sep 12, 2018 | 
            Sep 2, 2018 | 
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            | 8-K/A | 
            
              Open Document
              
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            Open Filing | 
            AMENDMENT NO. 2 TO CURRENT REPORT | 
            Sep 10, 2018 | 
            Aug 27, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Sep 5, 2018 | 
            Aug 31, 2018 | 
            000-08656 | 
          
          
            | 8-K/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 1 TO CURRENT REPORT | 
            Aug 31, 2018 | 
            Aug 27, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Aug 29, 2018 | 
            Aug 27, 2018 | 
            000-08656 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
            SC 13D/A | 
            Aug 28, 2018 | 
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            005-38473 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
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            Aug 23, 2018 | 
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            005-38473 | 
          
          
            | 4 | 
            
              Open Document
              
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            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Aug 23, 2018 | 
            Aug 21, 2018 | 
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            | 10-K | 
            
              Open Document
              | Data
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            Open Filing | 
            ANNUAL REPORT | 
            Aug 21, 2018 | 
            May 31, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Aug 14, 2018 | 
            Aug 9, 2018 | 
            000-08656 | 
          
          
            | 3 | 
            
              Open Document
              
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            Open Filing | 
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            Aug 6, 2018 | 
            Jul 27, 2018 | 
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            | 3 | 
            
              Open Document
              
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            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Aug 3, 2018 | 
            Jul 27, 2018 | 
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            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Jul 30, 2018 | 
            Jul 27, 2018 | 
            000-08656 | 
          
          
            | 3 | 
            
              Open Document
              
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            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Jul 30, 2018 | 
            Jul 23, 2018 | 
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            | SC 13D | 
            
              Open Document
              
             | 
            Open Filing | 
            SCHEDULE 13D | 
            Jul 30, 2018 | 
             | 
            005-38473 | 
          
          
            | SC 13D | 
            
              Open Document
              
             | 
            Open Filing | 
            SCHEDULE 13D | 
            Jul 30, 2018 | 
             | 
            005-38473 | 
          
          
            | SC 13D | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Jul 26, 2018 | 
             | 
            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Jul 25, 2018 | 
            Jul 24, 2018 | 
            000-08656 | 
          
          
            | 3 | 
            
              Open Document
              
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            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Jul 25, 2018 | 
            Jul 23, 2018 | 
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            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
            SC 13D/A | 
            Jul 24, 2018 | 
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            005-38473 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
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            Open Filing | 
            SC 13D/A | 
            Jul 24, 2018 | 
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            005-38473 | 
          
          
            | 4 | 
            
              Open Document
              
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            Open Filing | 
            FORM 4 SUBMISSION | 
            Jul 24, 2018 | 
            Jul 20, 2018 | 
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            | 4 | 
            
              Open Document
              
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            Open Filing | 
            FORM 4 SUBMISSION | 
            Jul 24, 2018 | 
            Jul 20, 2018 | 
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            | 3 | 
            
              Open Document
              
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            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Jul 24, 2018 | 
            Jul 17, 2018 | 
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            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Jul 18, 2018 | 
            Jul 17, 2018 | 
            000-08656 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 7 TO SCHEDULE 13D | 
            Jul 17, 2018 | 
             | 
            005-38473 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 3 TO SCHEDULE 13D | 
            Jul 17, 2018 | 
             | 
            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Jul 13, 2018 | 
            Jul 12, 2018 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Jul 10, 2018 | 
            Jul 9, 2018 | 
            000-08656 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 6 TO SCHEDULE 13D | 
            Jun 28, 2018 | 
             | 
            005-38473 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO.2 SCHEDULE 13D | 
            Jun 28, 2018 | 
             | 
            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
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            Open Filing | 
            CURRENT REPORT | 
            Jun 26, 2018 | 
            Jun 25, 2018 | 
            000-08656 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 12, 2018 | 
            Feb 28, 2018 | 
            000-08656 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 1 TO SCHEDULE 13D | 
            Feb 16, 2018 | 
             | 
            005-38473 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 16, 2018 | 
            Feb 14, 2018 | 
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            | 3 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 16, 2018 | 
            Dec 14, 2017 | 
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            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT NO. 5 TO SCHEDULE 13D | 
            Feb 16, 2018 | 
             | 
            005-38473 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 16, 2018 | 
            Feb 14, 2018 | 
             | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Jan 9, 2018 | 
            Nov 30, 2017 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Nov 29, 2017 | 
            Nov 29, 2017 | 
            000-08656 | 
          
          
            | ARS | 
            
              Open Document
              
             | 
            Open Filing | 
            ANNUAL REPORT OF SECURITY HOLDERS | 
            Oct 24, 2017 | 
            May 31, 2017 | 
            000-08656 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Oct 11, 2017 | 
            Aug 31, 2017 | 
            000-08656 | 
          
          
            | DEF 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            DEFINITIVE PROXY STATEMENT | 
            Sep 22, 2017 | 
            Nov 29, 2017 | 
            000-08656 | 
          
          
            | 10-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            ANNUAL REPORT | 
            Aug 15, 2017 | 
            May 31, 2017 | 
            000-08656 | 
          
          
            | 3 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Jul 6, 2017 | 
            Jul 5, 2017 | 
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            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Jul 5, 2017 | 
            Jun 30, 2017 | 
            000-08656 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Jun 15, 2017 | 
             | 
            005-38473 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Jun 12, 2017 | 
             | 
            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            May 30, 2017 | 
            May 30, 2017 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            May 25, 2017 | 
            May 25, 2017 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            May 19, 2017 | 
            May 18, 2017 | 
            000-08656 | 
          
          
            | SC 13D | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            May 18, 2017 | 
             | 
            005-38473 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 14, 2017 | 
            Feb 28, 2017 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Apr 14, 2017 | 
            Apr 14, 2017 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Mar 30, 2017 | 
            Mar 29, 2017 | 
            000-08656 | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            PRIMARY DOCUMENT | 
            Mar 15, 2017 | 
            Mar 9, 2017 | 
             | 
          
          
            | 4 | 
            
              Open Document
              
             | 
            Open Filing | 
            PRIMARY DOCUMENT | 
            Mar 15, 2017 | 
            Mar 9, 2017 | 
             | 
          
          
            | SC 13D | 
            
              Open Document
              
             | 
            Open Filing | 
            SCHEDULE 13D | 
            Mar 15, 2017 | 
             | 
            005-38473 | 
          
          
            | SC 13D/A | 
            
              Open Document
              
             | 
            Open Filing | 
            AMENDMENT TO SCHEDULE 13D | 
            Mar 15, 2017 | 
             | 
            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Mar 10, 2017 | 
            Mar 9, 2017 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Feb 28, 2017 | 
            Feb 28, 2017 | 
            000-08656 | 
          
          
            | SC 13G/A | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Jan 13, 2017 | 
             | 
            005-38473 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Jan 10, 2017 | 
            Nov 30, 2016 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Dec 7, 2016 | 
            Dec 7, 2016 | 
            000-08656 | 
          
          
            | ARS | 
            
              Open Document
              
             | 
            Open Filing | 
            ANNUAL REPORT TO SECURITY HOLDERS | 
            Nov 3, 2016 | 
            May 31, 2016 | 
            000-08656 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Oct 12, 2016 | 
            Aug 31, 2016 | 
            000-08656 | 
          
          
            | DEF 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            DEFINITIVE PROXY STATEMENT | 
            Sep 23, 2016 | 
            Dec 7, 2016 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Sep 2, 2016 | 
            Sep 2, 2016 | 
            000-08656 | 
          
          
            | 10-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            ANNUAL REPORT | 
            Jul 28, 2016 | 
            May 31, 2016 | 
            000-08656 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 7, 2016 | 
            Feb 29, 2016 | 
            000-08656 | 
          
          
            | 3 | 
            
              Open Document
              
             | 
            Open Filing | 
            OWNERSHIP DOCUMENT | 
            Feb 2, 2016 | 
            Jan 28, 2016 | 
             | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Jan 28, 2016 | 
            Jan 28, 2016 | 
            000-08656 | 
          
          
            | SC 13G/A | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Jan 15, 2016 | 
             | 
            005-38473 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Jan 12, 2016 | 
            Nov 30, 2015 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Dec 10, 2015 | 
            Dec 9, 2015 | 
            000-08656 | 
          
          
            | ARS | 
            
              Open Document
              
             | 
            Open Filing | 
            ANNUAL REPORT TO SECURITY HOLDERS | 
            Nov 2, 2015 | 
            May 31, 2015 | 
            000-08656 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Oct 9, 2015 | 
            Aug 31, 2015 | 
            000-08656 | 
          
          
            | DEF 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            DEFINITIVE PROXY STATEMENT | 
            Sep 24, 2015 | 
            Dec 9, 2015 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Aug 31, 2015 | 
            Aug 31, 2015 | 
            000-08656 | 
          
          
            | 10-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            ANNUAL REPORT | 
            Jul 30, 2015 | 
            May 31, 2015 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Jun 5, 2015 | 
            Jun 4, 2015 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Apr 28, 2015 | 
            Apr 27, 2015 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Apr 10, 2015 | 
            Apr 9, 2015 | 
            000-08656 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 9, 2015 | 
            Feb 28, 2015 | 
            000-08656 | 
          
          
            | SC 13G/A | 
            
              Open Document
              
             | 
            Open Filing | 
            SCHEDULE 13G/A | 
            Feb 5, 2015 | 
             | 
            005-38473 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Jan 9, 2015 | 
            Nov 30, 2014 | 
            000-08656 | 
          
          
            | SC 13G/A | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Jan 6, 2015 | 
             | 
            005-38473 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Dec 12, 2014 | 
            Dec 10, 2014 | 
            000-08656 | 
          
          
            | ARS | 
            
              Open Document
              
             | 
            Open Filing | 
            FORM OF ARS | 
            Nov 3, 2014 | 
            May 31, 2014 | 
            000-08656 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Oct 8, 2014 | 
            Aug 31, 2014 | 
            000-08656 | 
          
          
            | DEF 14A | 
            
              Open Document
              
             | 
            Open Filing | 
            SCHEDULE 14A | 
            Sep 24, 2014 | 
            Dec 10, 2014 | 
            000-08656 | 
          
          
            | 10-K | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            ANNUAL REPORT | 
            Aug 4, 2014 | 
            May 31, 2014 | 
            000-08656 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Apr 10, 2014 | 
            Feb 28, 2014 | 
            000-08656 | 
          
          
            | 8-K | 
            
              Open Document
              
             | 
            Open Filing | 
            CURRENT REPORT | 
            Feb 11, 2014 | 
            Feb 10, 2014 | 
            000-08656 | 
          
          
            | SC 13G/A | 
            
              Open Document
              
             | 
            Open Filing | 
            SCHEDULE 13G/A | 
            Feb 10, 2014 | 
             | 
            005-38473 | 
          
          
            | SC 13G/A | 
            
              Open Document
              
             | 
            Open Filing | 
             | 
            Jan 28, 2014 | 
             | 
            005-38473 | 
          
          
            | 10-Q | 
            
              Open Document
              | Data
             | 
            Open Filing | 
            QUARTERLY REPORT | 
            Jan 10, 2014 | 
            Nov 30, 2013 | 
            000-08656 |