| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Dec 2021 | 23 Dec 2021 | 001-39142 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Dec 2021 | 09 Dec 2021 | 001-39142 |
| 4 | Open Document | Open Filing | FORM 4 | 20 Apr 2021 | 16 Apr 2021 | 001-39142 |
| 4 | Open Document | Open Filing | FORM 4 | 15 Mar 2021 | 11 Mar 2021 | 001-39142 |
| 4 | Open Document | Open Filing | FORM 4 | 29 Dec 2020 | 23 Dec 2020 | 001-39142 |
| 3 | Open Document | Open Filing | FORM 3 | 29 Dec 2020 | 23 Dec 2020 | 001-39142 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 24 May 2017 | 15 May 2017 | 001-12471 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 Aug 2015 | 20 Aug 2015 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 05 Nov 2014 | 03 Nov 2014 | 000-27687 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 05 Nov 2014 | 03 Nov 2014 | 000-27687 |