| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 06 Jul 2023 | 03 Jul 2023 | 001-15070 |
| 4 | Open Document | Open Filing | 02 Jul 2021 | 30 Jun 2021 | 001-15070 | |
| 4 | Open Document | Open Filing | 16 Oct 2020 | 15 Oct 2020 | 001-15070 | |
| 4 | Open Document | Open Filing | 04 May 2020 | 30 Apr 2020 | 001-32295 | |
| 4 | Open Document | Open Filing | 16 May 2019 | 13 May 2019 | 001-15070 | |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Mar 2019 | 26 Feb 2019 | 001-15070 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 27 Feb 2019 | 26 Feb 2019 | 001-15070 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Sep 2018 | 27 Sep 2018 | 001-15070 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Mar 2018 | 13 Mar 2018 | 001-15070 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Dec 2017 | 12 Dec 2017 | 001-32295 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Dec 2017 | 29 Nov 2017 | 001-14778 |
| 3/A | Open Document | Open Filing | AMENDMENT NO. 1 TO OWNERSHIP DOCUMENT | 04 Oct 2017 | 11 Sep 2017 | 001-32295 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 14 Feb 2014 |