| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D | Open Document | Open Filing | 24 Mar 2022 | |||
| 3 | Open Document | Open Filing | INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES | 23 Mar 2022 | 22 Mar 2022 | 000-52528 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 15 Mar 2018 | 13 Mar 2018 | 000-28385 |
| 4 | Open Document | Open Filing | FORM 4 | 02 Mar 2018 | 28 Feb 2018 | 000-28385 |
| 4 | Open Document | Open Filing | FORM 4 | 12 Feb 2018 | 08 Feb 2018 | 000-28385 |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | 16 Sep 2014 | ||
| 3 | Open Document | Open Filing | FORM 3 | 16 Sep 2014 | 09 Sep 2014 | 000-54479 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Feb 2014 | 27 Aug 2013 | 000-28385 |
| 4/A | Open Document | Open Filing | FORM 4/A | 07 Feb 2014 | 11 Feb 2011 | 000-28385 |