| 8-K | Report of unscheduled material events or corporate event | Apr 15, 2013 |     |
| SC 13G/A | Amendment to a previously filed SC 13G | Feb 21, 2013 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 15, 2013 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 15, 2013 | |
| 10-Q | Quarterly report which provides a continuing view of a company's financial position | Feb 12, 2013 |   |
| 8-K | Report of unscheduled material events or corporate event | Jan 7, 2013 | |
| 8-K | Report of unscheduled material events or corporate event | Jan 4, 2013 | |
| 10-Q | Quarterly report which provides a continuing view of a company's financial position | Nov 13, 2012 | |
| D | Official notice of an offering of securities that is made without registration under the Securities Act in reliance on an exemption provided by Regulation D and Section 4(6) under the Act | Oct 25, 2012 | |
| 8-K | Report of unscheduled material events or corporate event | Sep 13, 2012 | |
| 8-K | Report of unscheduled material events or corporate event | Sep 13, 2012 | |
| 8-K | Report of unscheduled material events or corporate event | Sep 6, 2012 | |
| 10-Q/A | Amendment to a previously filed 10-Q | Aug 28, 2012 | |
| 10-Q | Quarterly report which provides a continuing view of a company's financial position | Aug 13, 2012 | |
| 4 | Statement of changes in beneficial ownership of securities | Aug 6, 2012 | |
| 4 | Statement of changes in beneficial ownership of securities | Aug 6, 2012 | |
| 3 | Initial filing by director officer or owner of more than ten percent. | Aug 3, 2012 | |
| 3 | Initial filing by director officer or owner of more than ten percent. | Aug 3, 2012 | |
| 8-K | Report of unscheduled material events or corporate event | Jul 27, 2012 | |
| S-8 | Securities offered to employees pursuant to employee benefit plans | Jul 27, 2012 | |
| 10-K | Annual report which provides a comprehensive overview of the company for the past year | Jun 29, 2012 | |
| 8-K | Report of unscheduled material events or corporate event | Jun 27, 2012 | |
| 8-K | Report of unscheduled material events or corporate event | Jun 6, 2012 | |
| 8-K | Report of unscheduled material events or corporate event | Jun 5, 2012 | |
| 8-K | Report of unscheduled material events or corporate event | May 30, 2012 | |
