| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 11 Jun 2021 | 22 Apr 2021 | 000-55900 | |
| 5 | Open Document | Open Filing | 01 Jun 2021 | 31 Dec 2020 | 000-55900 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 04 Jun 2018 | 31 May 2018 | 001-13957 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 29 Mar 2018 | 27 Mar 2018 | 001-13957 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 Feb 2018 | 19 Jan 2018 | 001-13957 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 01 Jun 2017 | 31 May 2017 | 001-13957 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 04 Apr 2017 | 31 Mar 2017 | 001-13957 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 04 Oct 2016 | 30 Sep 2016 | 001-13957 |