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Net Loss Per Share | 12 Months Ended
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Dec. 31, 2011
Net Loss Per Share [Abstract] |
Net Loss Per Share | 5. Net Loss Per Share Basic net loss per common share is calculated by dividing net loss by the weighted average number of common stock outstanding during the reporting period. For the years ended December 31, 2011, 2010 and 2009, basic and diluted net loss per share, are identical because the Company had losses from continuing operations and the impact of common equivalent shares would have been anti-dilutive and therefore excluded. For the year ended December 31, 2011, unvested restricted stock awards granted during the third quarter of fiscal 2011 are included in the calculation of basic weighted average shares because such shares are participating securities. The following table sets forth the computation of basic and diluted net loss per share for the periods indicated (in thousands, except per share data):
|  | Years Ended December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net loss attributable to common stockholders |  | $ | (52,550 | ) |  | $ | (19,453 | ) |  | $ | (26,188 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average shares used to compute basic and diluted net loss per common share |  |  | 45,546 |  |  |  | 29,778 |  |  |  | 4,040 |
Basic and diluted net loss per common share |  | $ | (1.15 | ) |  | $ | (0.65 | ) |  | $ | (6.48 | )
As the Company incurred net losses in the periods presented, the following table displays the Company's other outstanding common stock equivalents that were excluded from the computation of diluted net loss per share, as the effect of including them would have been antidilutive (in thousands):
|  | As of December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Stock options |  |  | 1,661 |  |  |  | 735 |  |  |  | 678 |
Restricted stock units |  |  | 1,775 |  |  |  | 3,426 |  |  |  | 4,537 |
Employee stock purchase plan |  |  | 579 |  |  |  | 1,000 |  |  |  | — |
Common stock warrants |  |  | 23 |  |  |  | 65 |  |  |  | 11 |
Convertible preferred stock |  |  | — |  |  |  | — |  |  |  | 28,044 |
Convertible preferred stock warrants |  |  | — |  |  |  | — |  |  |  | 58 |

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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 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256 Reference 2: 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=6945512&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: 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=6920599&loc=d3e1278-109256 Reference 5: 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 6: 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=6880815&loc=d3e20235-122688 + Details
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