| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 14, 2021 | Sep 13, 2021 | 000-20572 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 16, 2020 | Sep 14, 2020 | 000-20572 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 18, 2019 | Sep 16, 2019 | 000-20572 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 18, 2018 | Sep 17, 2018 | 000-20572 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Jun 12, 2018 | Jun 12, 2018 | 000-20572 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 4, 2018 | Apr 2, 2018 | 001-31921 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 13, 2018 | Mar 10, 2018 | 001-31921 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 5, 2017 | Apr 3, 2017 | 001-31921 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 14, 2017 | Mar 10, 2017 | 001-31921 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 5, 2016 | Apr 1, 2016 | 001-31921 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 15, 2016 | Mar 11, 2016 | 001-31921 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 20, 2016 | Jan 17, 2016 | 001-31921 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 12, 2015 | Mar 10, 2015 | 001-31921 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 12, 2014 | Mar 10, 2014 | 001-31921 |