| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jan 3, 2022 | Jan 1, 2022 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 16, 2021 | Aug 16, 2021 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 11, 2021 | Aug 9, 2021 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 16, 2021 | Feb 11, 2021 | 001-35746 | 
| 3 | Open Document | Open Filing | FORM 3 | Jan 29, 2021 | Jan 21, 2021 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 20, 2017 | Dec 15, 2017 | 000-26366 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 1, 2017 | Oct 31, 2017 | 000-26366 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 30, 2017 | Oct 26, 2017 | 000-26366 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 24, 2016 | Feb 23, 2016 | 000-26366 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 18, 2014 | Aug 14, 2014 | 000-26366 |