| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 17 Aug 2021 | 13 Aug 2020 | 000-53166 | |
| SC 13D/A | Open Document | Open Filing | 02 Dec 2020 | |||
| 4 | Open Document | Open Filing | 01 Dec 2020 | 29 Nov 2020 | 000-53166 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Sep 2019 | 05 Jan 2018 | 000-53166 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 18 Sep 2019 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 09 Nov 2017 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 08 Sep 2017 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 04 May 2017 | ||
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 Feb 2017 | 08 Dec 2016 | 000-53166 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Dec 2016 | 08 Dec 2016 | 000-53166 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 15 Nov 2016 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Nov 2016 | 10 Nov 2016 | 000-53166 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Feb 2016 | 22 Feb 2016 | 000-53166 |
| SC 13D | Open Document | Open Filing | SC 13D | 18 Dec 2015 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Dec 2015 | 07 Dec 2015 | 000-53166 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Nov 2015 | 24 Jul 2015 | 000-53166 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 22 Jul 2015 | 24 Jun 2015 | 000-53166 |