| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 12, 2021 | May 10, 2021 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 22, 2021 | Mar 22, 2021 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 15, 2021 | Mar 12, 2021 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 3, 2021 | Mar 1, 2021 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 12, 2020 | Nov 9, 2020 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 12, 2020 | Aug 10, 2020 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 13, 2020 | May 11, 2020 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 24, 2020 | Mar 20, 2020 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 6, 2019 | Dec 5, 2019 | 000-11634 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Jul 10, 2019 | Jun 27, 2019 | 000-11634 |