| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO.5 TO SCHEDULE 13D | 23 Nov 2021 | ||
| 4 | Open Document | Open Filing | 01 Nov 2021 | 28 Oct 2021 | 000-52759 | |
| 4 | Open Document | Open Filing | 21 Jan 2021 | 21 Jan 2021 | 000-52759 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO.4 TO SCHEDULE 13D | 21 Jan 2021 | ||
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 3 TO SCHEDULE 13D | 07 Jan 2021 | ||
| 4 | Open Document | Open Filing | 07 Jan 2021 | 07 Jan 2021 | 000-52759 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 2 TO SCHEDULE 13D | 04 Dec 2020 | ||
| 4 | Open Document | Open Filing | 03 Dec 2020 | 01 Dec 2020 | 000-52759 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 TO SCHEDULE 13D | 17 Nov 2020 | ||
| 4 | Open Document | Open Filing | 12 Nov 2020 | 10 Nov 2020 | 000-52759 | |
| 4 | Open Document | Open Filing | 12 Aug 2020 | 12 Aug 2020 | 000-52759 | |
| 4 | Open Document | Open Filing | 05 Aug 2020 | 05 Aug 2020 | 000-52759 | |
| 4 | Open Document | Open Filing | 24 Jun 2020 | 19 Jun 2020 | 000-52759 | |
| 4 | Open Document | Open Filing | 05 Jun 2020 | 03 Jun 2020 | 000-52759 | |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | 30 Apr 2020 | ||
| 3 | Open Document | Open Filing | 29 Apr 2020 | 21 Apr 2020 | 000-52759 |