| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 20 May 2021 | 19 May 2021 | 001-36325 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 21 May 2020 | 20 May 2020 | 001-36325 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2019 | 22 May 2019 | 001-36325 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 May 2018 | 23 May 2018 | 001-36325 |
| 4 | Open Document | Open Filing | FORM 4 | 25 May 2017 | 24 May 2017 | 001-36325 |
| 4 | Open Document | Open Filing | FORM 4 | 26 May 2016 | 25 May 2016 | 001-36325 |
| 4 | Open Document | Open Filing | FORM 4 | 28 May 2015 | 27 May 2015 | 001-36325 |
| 4 | Open Document | Open Filing | FORM 4 | 28 Aug 2014 | 27 Aug 2014 | 001-36325 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 13 May 2014 | 13 May 2014 | 001-36325 |