| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4/A | Open Document | Open Filing | FORM 4/A | Jan 27, 2023 | Jan 20, 2023 | 000-20214 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 24, 2023 | Jan 20, 2023 | 000-20214 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 15, 2022 | Jul 14, 2022 | 000-20214 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 6, 2022 | Jul 1, 2022 | 000-20214 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 2, 2022 | Feb 28, 2022 | 000-20214 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | Jun 22, 2021 | Jun 17, 2021 | 000-20214 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP | Mar 2, 2021 | Mar 1, 2021 | 000-20214 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP | Feb 11, 2021 | Nov 2, 2020 | 000-20214 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 15, 2020 | Jul 14, 2020 | 000-20214 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2020 | Feb 29, 2020 | 000-20214 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 29, 2019 | Jul 25, 2019 | 000-20214 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 10, 2019 | May 29, 2019 | 000-20214 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 19, 2018 | Mar 16, 2018 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 13, 2018 | Mar 13, 2018 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 6, 2018 | Mar 5, 2018 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 2, 2018 | Feb 1, 2018 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 1, 2017 | Nov 29, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 2, 2017 | Nov 1, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2017 | Oct 2, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 6, 2017 | Sep 1, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 2, 2017 | Aug 1, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 5, 2017 | Jul 3, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 1, 2017 | Jun 1, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 16, 2017 | May 16, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2017 | Mar 16, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2017 | Mar 13, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2017 | Feb 1, 2017 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 23, 2016 | Nov 21, 2016 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 21, 2016 | Mar 18, 2016 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 18, 2016 | Mar 17, 2016 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 16, 2016 | Mar 14, 2016 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 8, 2015 | Jul 7, 2015 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 2, 2015 | Jul 1, 2015 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 23, 2015 | Jun 22, 2015 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 2, 2015 | Jun 1, 2015 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 19, 2015 | Mar 18, 2015 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2015 | Mar 16, 2015 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 13, 2015 | Mar 12, 2015 | 001-07562 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 2, 2015 | Feb 1, 2015 | 001-07562 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 10, 2014 | Dec 1, 2014 | 001-07562 |