| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 21 May 2021 | 19 May 2021 | 001-36052 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 Mar 2021 | 26 Feb 2021 | 001-36052 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Aug 2020 | 06 Aug 2020 | 001-36052 |
| 4 | Open Document | Open Filing | FORM 4 | 06 May 2020 | 05 May 2020 | 001-36052 |
| 4 | Open Document | Open Filing | FORM 4 | 10 May 2019 | 08 May 2019 | 001-36052 |
| 4 | Open Document | Open Filing | FORM 4 | 11 May 2018 | 09 May 2018 | 001-36052 |
| 4 | Open Document | Open Filing | FORM 4 | 05 May 2017 | 03 May 2017 | 001-36052 |
| 4 | Open Document | Open Filing | FORM 4 | 05 May 2016 | 04 May 2016 | 001-36052 |
| 4 | Open Document | Open Filing | FORM 4 | 06 May 2015 | 05 May 2015 | 001-36052 |
| 4 | Open Document | Open Filing | FORM 4 | 06 Aug 2014 | 05 Aug 2014 | 001-36052 |