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Net Loss Per Share | 12 Months Ended
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Dec. 31, 2013
Net Loss Per Share [Abstract] |
Net Loss Per Share | 15. Net Loss Per Share Basic net loss per common share for the years ended December 31, 2013, 2012 and 2011 was computed by dividing the net loss by the weighted average number of shares of common stock outstanding during the year. Diluted loss per common share is computed by dividing net loss by the weighted average number of shares of common stock and common stock equivalents outstanding during the year. Potential common stock equivalents of approximately 0.8 million, 4.7 million and 5.4 million outstanding stock warrants, 11,000, 52,000 and 55,000 shares issuable upon conversion of preferred stock and 1.6 million, 1.7 million and 19,000 stock options are excluded from the diluted earnings per share calculation for the years ended December 31, 2013, 2012 and 2011, respectively, due to their anti-dilutive effect.
(in thousands, except per share amounts) |  | Years ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
BASIC AND DILUTED |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding |  |  | 35,266 |  |  |  | 33,003 |  |  |  | 26,784 |
Net loss |  | $ | (13,080 | ) |  | $ | (9,287 | ) |  | $ | (17,145 | )
Net loss per shares basic and diluted |  | $ | (0.37 | ) |  | $ | (0.28 | ) |  | $ | (0.64 | )

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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