| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jan 2023 | 31 Dec 2022 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Mar 2022 | 10 Mar 2022 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jan 2022 | 31 Dec 2021 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Mar 2021 | 11 Mar 2021 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jan 2021 | 31 Dec 2020 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Mar 2020 | 12 Mar 2020 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Jan 2020 | 10 Jan 2020 | 001-37995 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jan 2020 | 31 Dec 2019 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Jul 2019 | 23 Jul 2019 | 001-37995 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Jul 2019 | 23 Jul 2019 | 001-37995 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Mar 2019 | 07 Mar 2019 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jan 2019 | 31 Dec 2018 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Mar 2018 | 08 Mar 2018 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jan 2018 | 29 Dec 2017 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Mar 2017 | 09 Mar 2017 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Mar 2016 | 10 Mar 2016 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Dec 2015 | 17 Dec 2015 | 000-06920 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Dec 2015 | 17 Dec 2015 | 000-06920 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 Mar 2015 | 24 Mar 2015 | 001-35255 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Nov 2014 | 17 Nov 2014 | 001-35255 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Nov 2014 | 13 Nov 2014 | 001-35255 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Nov 2014 | 07 Nov 2014 | 001-35255 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 13 Feb 2014 | 11 Feb 2014 | 001-35255 |