| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Mar 2022 | 21 Mar 2022 | 001-39794 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 06 Dec 2021 | 06 Dec 2021 | 001-41127 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Dec 2020 | 10 Dec 2020 | 001-39794 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Mar 2015 | 28 Feb 2015 | 001-06686 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jun 2014 | 30 May 2014 | 001-06686 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jun 2013 | 12 Jun 2013 | 001-06686 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2013 | 31 May 2013 | 001-06686 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2012 | 31 May 2012 | 001-06686 |