| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jun 16, 2022 | Jun 16, 2022 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 11, 2021 | Jun 10, 2021 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 18, 2020 | Jun 17, 2020 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 14, 2019 | Jun 13, 2019 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 10, 2019 | Jun 6, 2019 | 001-38419 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 14, 2018 | Jun 12, 2018 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 2, 2018 | Apr 1, 2018 | 000-31141 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Apr 2, 2018 | Apr 1, 2018 | 000-31141 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Mar 14, 2018 | Mar 14, 2018 | 001-38419 |