| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 11 May 2022 | 10 May 2022 | 001-14461 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2021 | 14 May 2021 | 001-14461 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Jan 2021 | 14 Jan 2021 | 001-39897 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Nov 2020 | 16 Nov 2020 | 001-14461 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2019 | 21 May 2019 | 001-14461 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2018 | 16 May 2018 | 001-14461 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 20 Jun 2017 | 16 Jun 2017 | 001-16249 |
| 3 | Open Document | Open Filing | FORM 3 | 01 Jun 2017 | 26 May 2017 | 001-38021 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 May 2017 | 10 May 2017 | 001-14461 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Feb 2017 | 08 Feb 2017 | 001-14461 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 Sep 2016 | 02 Sep 2016 | 001-35967 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 21 Jun 2016 | 17 Jun 2016 | 001-16249 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 26 May 2016 | 24 May 2016 | 001-35967 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2016 | 10 Feb 2016 | 001-14461 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 Jun 2015 | 12 Jun 2015 | 001-16249 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 Jun 2015 | 29 May 2015 | 001-16249 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 21 May 2015 | 19 May 2015 | 001-35967 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Feb 2015 | 19 Feb 2015 | 001-14461 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 03 Feb 2015 | 30 Jan 2015 | 001-16249 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 18 Aug 2014 | ||
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 22 May 2014 | 20 May 2014 | 001-35967 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Feb 2014 | 03 Feb 2014 | 001-14461 |
| 4 | Open Document | Open Filing | BERKMAN FORM 4 ANNUAL GRANT 011414 | 16 Jan 2014 | 14 Jan 2014 | 001-16249 |
| 4 | Open Document | Open Filing | BERKMAN FORM 4 010214 | 06 Jan 2014 | 02 Jan 2014 | 001-16249 |