| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 19 Aug 2021 | 17 Aug 2021 | 000-23153 | |
| 4 | Open Document | Open Filing | 02 May 2018 | 01 May 2018 | 000-23153 | |
| 4 | Open Document | Open Filing | 13 Apr 2018 | 30 Nov 2017 | 000-23153 | |
| 4 | Open Document | Open Filing | 16 Mar 2017 | 19 Dec 2016 | 000-23153 | |
| 3 | Open Document | Open Filing | 16 Mar 2017 | 06 Jan 2017 | 000-23153 |