| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 6, 2023 | Jul 3, 2023 | 001-15070 |
| 4 | Open Document | Open Filing | Jul 2, 2021 | Jun 30, 2021 | 001-15070 | |
| 4 | Open Document | Open Filing | Oct 16, 2020 | Oct 15, 2020 | 001-15070 | |
| 4 | Open Document | Open Filing | May 4, 2020 | Apr 30, 2020 | 001-32295 | |
| 4 | Open Document | Open Filing | May 16, 2019 | May 13, 2019 | 001-15070 | |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 1, 2019 | Feb 26, 2019 | 001-15070 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 27, 2019 | Feb 26, 2019 | 001-15070 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 28, 2018 | Sep 27, 2018 | 001-15070 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 14, 2018 | Mar 13, 2018 | 001-15070 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 14, 2017 | Dec 12, 2017 | 001-32295 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 1, 2017 | Nov 29, 2017 | 001-14778 |
| 3/A | Open Document | Open Filing | AMENDMENT NO. 1 TO OWNERSHIP DOCUMENT | Oct 4, 2017 | Sep 11, 2017 | 001-32295 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Feb 14, 2014 |