| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Jul 2022 | 11 Jul 2022 | 000-53482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Dec 2020 | 23 Dec 2020 | 000-53482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2020 | 21 May 2020 | 000-53482 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Dec 2019 | 23 Dec 2019 | 000-53482 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Dec 2019 | 19 Dec 2019 | 000-53482 |
| 4 | Open Document | Open Filing | 19 Dec 2019 | 17 Dec 2019 | 000-53482 | |
| 4 | Open Document | Open Filing | FORM 4 | 12 Jan 2016 | 08 Jan 2016 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 09 Dec 2015 | 07 Dec 2015 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 15 Oct 2015 | 26 Jan 2015 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Mar 2015 | 19 Jan 2015 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 05 Mar 2014 | 03 Mar 2014 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 24 Feb 2014 | 21 Feb 2014 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Feb 2014 | 31 Jan 2014 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 11 Dec 2013 | 08 Dec 2013 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 16 Jul 2013 | 12 Jul 2013 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 19 Jun 2013 | 17 Jun 2013 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 05 Jun 2013 | 04 Jun 2013 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 31 Dec 2012 | 28 Dec 2012 | 000-53482 |
| 4 | Open Document | Open Filing | FORM 4 | 20 Aug 2012 | 16 Aug 2012 | 000-53482 |
| 3 | Open Document | Open Filing | FORM 3 | 09 Aug 2012 | 30 Jul 2012 | 000-53482 |