| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 12 May 2021 | 10 May 2021 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 22 Mar 2021 | 22 Mar 2021 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 15 Mar 2021 | 12 Mar 2021 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 03 Mar 2021 | 01 Mar 2021 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 12 Nov 2020 | 09 Nov 2020 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 12 Aug 2020 | 10 Aug 2020 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 13 May 2020 | 11 May 2020 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 Mar 2020 | 20 Mar 2020 | 000-11634 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 06 Dec 2019 | 05 Dec 2019 | 000-11634 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 10 Jul 2019 | 27 Jun 2019 | 000-11634 |