| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 3 | Open Document | Open Filing | 13 Aug 2021 | 12 Feb 2021 | 811-22963 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Dec 2020 | 04 Dec 2020 | 001-39754 |
| 3 | Open Document | Open Filing | 01 Dec 2020 | 01 Dec 2020 | 001-39754 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Aug 2019 | 30 Jul 2019 | 001-38186 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Aug 2017 | 15 Aug 2017 | 001-38186 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jul 2017 | 29 Jun 2017 | 001-37588 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Feb 2017 | 07 Feb 2017 | 001-37588 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Nov 2016 | 23 Nov 2016 | 000-26841 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Nov 2016 | 22 Nov 2016 | 000-26841 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Nov 2016 | 07 Nov 2016 | 000-26841 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Aug 2016 | 15 Aug 2016 | 001-37588 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Dec 2015 | 07 Dec 2015 | 000-26841 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Oct 2015 | 13 Oct 2015 | 001-37588 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Mar 2015 | 19 Mar 2015 | 001-35898 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Dec 2014 | 08 Dec 2014 | 000-26841 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Dec 2014 | 08 Dec 2014 | 000-26841 |