| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Jun 2022 | 22 Apr 2022 | 000-52635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Jan 2021 | 21 Oct 2020 | 000-52635 |
| 4 | Open Document | Open Filing | FORM 4 | 18 Jun 2018 | 15 Jun 2018 | 000-52635 |
| 4 | Open Document | Open Filing | FORM 4 | 22 Aug 2017 | 21 Aug 2017 | 000-52635 |
| 4 | Open Document | Open Filing | FORM 4 | 18 May 2017 | 16 May 2017 | 000-52635 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Jan 2017 | 01 Jan 2017 | 000-52635 |
| 4 | Open Document | Open Filing | FORM 4 | 19 Dec 2016 | 15 Dec 2016 | 000-52635 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Dec 2016 | 05 Dec 2016 | 000-52635 |
| SC 13D/A | Open Document | Open Filing | SCHEDULE 13D/A | 20 Mar 2015 |