| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Dec 2021 | 10 Dec 2021 | 000-26926 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 Nov 2021 | 15 Nov 2021 | 000-26926 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 31 Aug 2021 | 27 Aug 2021 | 000-26926 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Dec 2020 | 10 Dec 2020 | 000-26926 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 25 Nov 2020 | 24 Nov 2020 | 000-26926 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 Nov 2020 | 19 Nov 2020 | 000-26926 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 Nov 2020 | 15 Nov 2020 | 000-26926 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 Mar 2020 | 13 Mar 2020 | 000-26926 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 19 Dec 2019 | 10 Dec 2019 | 000-26926 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 19 Nov 2019 | 15 Nov 2019 | 000-26926 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 10 Dec 2018 | 28 Nov 2018 | 000-26926 |