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Earnings Per Share | 12 Months Ended
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Dec. 31, 2014
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Basic earnings per share (“EPS”) excludes dilution and is computed by dividing net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock using the treasury stock method. Potentially dilutive securities (consisting of warrants, options and restricted stock units (“RSUs”) and employee stock purchase plan (“ESPP”) withholdings calculated using the treasury stock method) are excluded from the diluted EPS computation in loss periods and when the applicable exercise price is greater than the market price on the period end date as their effect would be anti-dilutive. Weighted average options, restricted stock units, warrants and ESPP shares to acquire a total of 8,130,000 shares, 4,424,000 shares and 5,793,000 shares of common stock for the years ended December 31, 2014, 2013 and 2012, respectively, were outstanding but not included in the computation of diluted earnings per share as their effect was anti-dilutive.
| Year Ended December 31,
| 2014 |  | 2013 |  | 2012
| (in thousands except per share amounts)
Numerator |  |  |  |  |
Net loss attributable to common shareholders: | $ | (39,674 | ) |  | $ | (43,413 | ) |  | $ | (89,266 | )
Denominator |  |  |  |  |  |  |  |
Weighted-average common shares outstanding | 37,959 |  |  | 33,948 |  |  | 32,852 |
Basic and diluted net loss per share attributable to common shareholders | $ | (1.05 | ) |  | $ | (1.28 | ) |  | $ | (2.72 | )

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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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