| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 5 | Open Document | Open Filing | ANNUAL STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP | Mar 23, 2022 | Dec 31, 2021 | 001-08429 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 8, 2016 | Mar 8, 2016 | 001-08491 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 12, 2016 | Jan 8, 2016 | 001-13105 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 2, 2015 | Jul 1, 2015 | 001-08491 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 29, 2015 | Jun 25, 2015 | 001-08491 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 24, 2015 | Jun 22, 2015 | 001-08491 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 24, 2015 | Apr 23, 2015 | 001-13105 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 23, 2015 | Mar 20, 2015 | 001-08491 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 27, 2015 | Feb 25, 2015 | 001-13105 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Feb 27, 2015 | Feb 25, 2015 | 001-13105 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 28, 2014 | Aug 26, 2014 | 001-08491 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 28, 2014 | Aug 26, 2014 | 001-08491 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 27, 2014 | Jun 25, 2014 | 001-08491 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2014 | Mar 3, 2014 | 001-08491 |