| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4/A | Open Document | Open Filing | FORM 4/A | 08 Sep 2021 | 16 Dec 2020 | 001-35033 |
| 4 | Open Document | Open Filing | FORM 4 | 17 Dec 2020 | 16 Dec 2020 | 001-35033 |
| 4 | Open Document | Open Filing | FORM 4 | 16 Dec 2015 | 15 Dec 2015 | 001-35033 |
| 4 | Open Document | Open Filing | FORM 4 | 28 Sep 2012 | 27 Apr 2012 | 001-35033 |