| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 - | Aug 5, 2021 | Aug 3, 2021 | 000-26408 |
| 4 | Open Document | Open Filing | FORM 4 - | Aug 11, 2020 | Aug 7, 2020 | 000-26408 |
| 3 | Open Document | Open Filing | FORM 3 - | Dec 23, 2019 | Dec 11, 2019 | 000-26408 |
| 4 | Open Document | Open Filing | 4 | Mar 4, 2019 | Feb 28, 2019 | 001-36477 |
| 4 | Open Document | Open Filing | 4 | Dec 6, 2018 | Nov 2, 2018 | 001-36477 |
| 4 | Open Document | Open Filing | 4 | Nov 6, 2017 | Nov 2, 2017 | 001-36477 |
| 4 | Open Document | Open Filing | 4 | Feb 2, 2017 | Jan 31, 2017 | 001-36477 |
| 4 | Open Document | Open Filing | 4 | Nov 21, 2016 | Nov 17, 2016 | 001-36477 |
| 4 | Open Document | Open Filing | 4 | Jun 27, 2016 | Jun 23, 2016 | 001-36477 |
| 3 | Open Document | Open Filing | 3 | Jun 16, 2016 | Jun 9, 2016 | 001-36477 |