| Unaudited Quarterly Financial Data (in thousands, except per share data) |
20. Unaudited Quarterly Financial Data (in thousands, except per share data) | | | | Quarters ended | | | | | March 31, | | June 30, | | September 30, | | December 31, | | | 2013 | | 2013 | | 2013 | | 2013 | | Product revenue | $ | 4,672 | | $ | 5,581 | | $ | 2,535 | | $ | 5,658 | | Service revenue | 1,373 | | 1,549 | | 1,630 | | 2,107 | | Research and development contract revenue | 400 | | 368 | | 462 | | 267 | | Net loss attributable to common shareholders | (8,576) | | (9,338) | | (15,948) | | (28,929) | | Loss per share: | | | | | | | | | Basic and Diluted | (0.18) | | (0.14) | | (0.19) | | (0.28) | | | | | | | | | | | | | | | | | | | | | | | | | | Quarters ended | | | | | March 31, | | June 30, | | September 30, | | December 31, | | | 2012 | | 2012 | | 2012 | | 2012 | | Product revenue | $ | 6,572 | | $ | 6,244 | | $ | 3,418 | | $ | 4,558 | | Service revenue | 665 | | 957 | | 855 | | 1,138 | | Research and development contract revenue | 515 | | 458 | | 502 | | 226 | | Net loss attributable to common shareholders | (6,583) | | (6,480) | | (10,325) | | (8,474) | | Loss per share: | | | | | | | | | Basic and Diluted | (0.28) | | (0.17) | | (0.27) | | (0.22) | |