v2.4.0.8

Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2012
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation | Income tax benefit for the years ended December 31, 2012 and 2011 differed from amounts computed by applying the applicable U.S. federal corporate income tax rate of 34% to loss before income taxes as a result of the following:
|  | 2012 |  |  | 2011 |
Computed statutory income tax benefit |  | $ | (27,837 | ) |  | $ | (28,995 | )
(Increase) reduction in income tax benefit resulting from State income tax benefit, net of federal income taxes |  |  | (3,711 | ) |  |  | (3,893 | )
Nondeductible stock based compensation |  |  | 333 |  |  |  | 203 |
Contribution of services by shareholder |  |  | 527 |  |  |  | 71 |
Research and development tax credits |  |  | — |  |  |  | (2,515 | )
Other, net |  |  | (238 | ) |  |  | 477 |
|  |  | (30,926 | ) |  |  | (34,652 | )
Change in valuation allowance for deferred tax assets |  |  | 30,926 |  |  |  | 34,652 |
Total income tax provision |  | $ | — |  |  | $ | — |
Schedule of Deferred Tax Assets and Liabilities | The tax effects of temporary differences that comprise the deferred tax assets and liabilities at December 31 are as follows:
|  | 2012 |  |  | 2011 |
Deferred tax assets |  |  |  |  |  |  |  |
Equity securities |  | $ | 4,346 |  |  | $ | 1,098 |
Accrued liabilities |  |  | 1,910 |  |  |  | 915 |
Stock-based compensation |  |  | 363 |  |  |  | 178 |
Deferred revenue |  |  | 22,684 |  |  |  | 6,546 |
Research and development tax credits |  |  | 5,848 |  |  |  | 5,556 |
Net operating loss carryforwards |  |  | 80,159 |  |  |  | 70,679 |
Total deferred tax assets |  |  | 115,310 |  |  |  | 84,972 |
Less: Valuation allowance |  |  | 113,051 |  |  |  | 82,125 |
Net deferred tax assets |  |  | 2,259 |  |  |  | 2,847 |
Deferred tax liabilities |  |  |  |  |  |  |  |
Property and equipment |  |  | 478 |  |  |  | 406 |
Intangible assets |  |  | 1,781 |  |  |  | 2,441 |
Total deferred tax liabilities |  |  | 2,259 |  |  |  | 2,847 |
Net deferred tax assets (liabilities) |  | $ | — |  |  | $ | — |
Summary of Valuation Allowance | Activity within the valuation allowance for deferred tax assets during the years ended December 31, 2012 and 2011 was as follows:
|  | 2012 |  |  | 2011 |
Valuation allowance at beginning of year |  | $ | 82,125 |  |  | $ | 52,036 |
(Decrease) increase in valuation allowance as a result of |  |  |  |  |  |  |  |
Mergers and acquisitions, net |  |  | — |  |  |  | (4,563 | )
Current year operations |  |  | 30,926 |  |  |  | 34,652 |
Valuation allowance at end of year |  | $ | 113,051 |  |  | $ | 82,125 |

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 + Details
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