| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 23 May 2023 | 19 May 2023 | 001-36104 |
| 4 | Open Document | Open Filing | FORM 4 | 23 May 2022 | 19 May 2022 | 001-36104 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 May 2021 | 20 May 2021 | 001-36104 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Aug 2020 | 28 Aug 2020 | 001-36104 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2020 | 10 May 2020 | 001-36104 |
| 4 | Open Document | Open Filing | FORM 4 | 23 Jan 2017 | 19 Jan 2017 | 000-18859 |
| 4 | Open Document | Open Filing | FORM 4 | 01 Feb 2016 | 28 Jan 2016 | 000-18859 |
| 4 | Open Document | Open Filing | FORM 4 | 13 Apr 2015 | 09 Apr 2015 | 000-18859 |
| 4 | Open Document | Open Filing | FORM 4 | 02 Feb 2015 | 29 Jan 2015 | 000-18859 |
| 3 | Open Document | Open Filing | FORM 3 | 22 Apr 2014 | 16 Apr 2014 | 000-18859 |