| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 07 Jun 2021 | 03 Jun 2021 | 001-12934 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 5 TO SCHEDULE 13D | 01 Apr 2019 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Mar 2018 | 19 Mar 2018 | 001-12934 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 4 TO SCHEDULE 13D | 19 Sep 2017 | ||
| SC 13D/A | Open Document | Open Filing | SCHEDULE 13D | 25 Feb 2016 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Feb 2016 | 29 Jan 2016 | 001-12934 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Nov 2015 | 11 Nov 2015 | 001-12934 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Sep 2015 | 01 Sep 2015 | 001-12934 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Aug 2015 | 27 Aug 2015 | 001-12934 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Nov 2014 | 25 Nov 2014 | 001-12934 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Aug 2014 | 19 Aug 2014 | 001-12934 |
| SC 13D/A | Open Document | Open Filing | SCHEDULE 13D/A | 27 Jun 2014 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Jun 2014 | 13 Jun 2014 | 001-12934 |