| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 25 Apr 2023 | 21 Apr 2023 | 000-06253 | |
| 4 | Open Document | Open Filing | 28 Feb 2023 | 26 Feb 2023 | 000-06253 | |
| 4 | Open Document | Open Filing | 27 Feb 2023 | 23 Feb 2023 | 000-06253 | |
| 4 | Open Document | Open Filing | 23 Jan 2023 | 19 Jan 2023 | 000-06253 | |
| 4 | Open Document | Open Filing | 20 Dec 2022 | 16 Dec 2022 | 000-06253 | |
| 4 | Open Document | Open Filing | 25 Apr 2022 | 21 Apr 2022 | 000-06253 | |
| 4 | Open Document | Open Filing | 29 Mar 2022 | 25 Mar 2022 | 000-06253 | |
| 4 | Open Document | Open Filing | 01 Mar 2022 | 26 Feb 2022 | 000-06253 | |
| 4 | Open Document | Open Filing | 25 Feb 2022 | 23 Feb 2022 | 000-06253 | |
| 4 | Open Document | Open Filing | 26 Jan 2022 | 24 Jan 2022 | 000-06253 | |
| 4 | Open Document | Open Filing | 17 Dec 2021 | 16 Dec 2021 | 000-06253 | |
| 4 | Open Document | Open Filing | 23 Apr 2021 | 21 Apr 2021 | 000-06253 | |
| 4 | Open Document | Open Filing | 29 Mar 2021 | 25 Mar 2021 | 000-06253 | |
| 4 | Open Document | Open Filing | 02 Mar 2021 | 26 Feb 2021 | 000-06253 | |
| 4 | Open Document | Open Filing | 22 Jan 2021 | 20 Jan 2021 | 000-06253 | |
| 4 | Open Document | Open Filing | 21 Jan 2021 | 18 Jan 2021 | 000-06253 | |
| 4 | Open Document | Open Filing | 18 Dec 2020 | 16 Dec 2020 | 000-06253 | |
| 3 | Open Document | Open Filing | 10 Apr 2020 | 01 Apr 2020 | 000-06253 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Jan 2016 | 19 Jan 2016 | 000-06253 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Aug 2015 | 10 Aug 2015 | 000-06253 |
| 3 | Open Document | Open Filing | 16 Jul 2015 | 15 Jul 2015 | 000-06253 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 Feb 2015 | 13 Feb 2015 | 000-22759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 15 Jan 2015 | 13 Jan 2015 | 000-22759 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Jan 2015 | 01 Jan 2015 | 000-22759 |