| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Jun 2, 2021 | Jun 1, 2021 | 001-13677 | |
| 3 | Open Document | Open Filing | Feb 1, 2021 | Feb 1, 2021 | 001-13677 | |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 30, 2016 | Dec 31, 2015 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 23, 2016 | Mar 21, 2016 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2015 | Nov 5, 2015 | 000-12508 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 4, 2015 | Mar 16, 2015 | 000-12508 |
| 144 | Open Document | Open Filing | 144 | Nov 4, 2015 | ||
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 4, 2015 | Mar 4, 2015 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 26, 2015 | Mar 16, 2015 | 000-12508 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 9, 2015 | Mar 4, 2015 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 6, 2015 | Mar 4, 2015 | 000-12508 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2015 | Mar 4, 2015 | 000-12508 |