| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 10 May 2021 | 06 May 2021 | 000-51371 |
| 4 | Open Document | Open Filing | FORM 4 | 17 Jun 2020 | 16 Jun 2020 | 000-51371 |
| 4 | Open Document | Open Filing | FORM 4 | 09 Dec 2019 | 06 Dec 2019 | 000-51371 |
| 4 | Open Document | Open Filing | FORM 4 | 06 May 2019 | 02 May 2019 | 000-51371 |
| 4 | Open Document | Open Filing | FORM 4 | 09 May 2017 | 05 May 2017 | 000-51371 |
| 4 | Open Document | Open Filing | FORM 4 | 05 May 2016 | 03 May 2016 | 000-51371 |
| 4 | Open Document | Open Filing | FORM 4 | 05 May 2015 | 01 May 2015 | 000-51371 |
| 4 | Open Document | Open Filing | FORM 4 | 06 May 2014 | 02 May 2014 | 000-51371 |
| 4 | Open Document | Open Filing | FORM 4 | 02 May 2013 | 30 Apr 2013 | 000-51371 |
| 4 | Open Document | Open Filing | FORM 4 | 03 May 2012 | 01 May 2012 | 000-51371 |