| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 07 May 2021 | 05 May 2021 | 001-36523 | |
| 4 | Open Document | Open Filing | 08 May 2020 | 06 May 2020 | 001-36523 | |
| 4 | Open Document | Open Filing | 13 May 2019 | 09 May 2019 | 001-36523 | |
| 4 | Open Document | Open Filing | 05 Jun 2018 | 01 Jun 2018 | 001-36523 | |
| 4 | Open Document | Open Filing | 12 May 2017 | 10 May 2017 | 001-36523 | |
| 4 | Open Document | Open Filing | 17 May 2016 | 13 May 2016 | 001-36523 | |
| 4 | Open Document | Open Filing | 23 Feb 2016 | 19 Feb 2016 | 001-36523 | |
| 4 | Open Document | Open Filing | 4 | 16 Mar 2015 | 12 Mar 2015 | 001-36523 |
| 3 | Open Document | Open Filing | FORM 3 | 26 Jan 2015 | 14 Jan 2015 | 001-36523 |