| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 5 | 17 Mar 2022 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Mar 2022 | 08 Feb 2021 | 000-53944 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Sep 2020 | 01 May 2020 | 000-53944 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 4 | 10 Sep 2020 | ||
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 3 | 27 Aug 2018 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Aug 2018 | 12 Apr 2018 | 000-53944 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 2 | 16 Mar 2017 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Mar 2017 | 05 Jan 2017 | 000-53944 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 | 05 Mar 2015 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Mar 2015 | 02 Mar 2015 | 000-53944 |