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Income Taxes (Tables)
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12 Months Ended |
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Dec. 31, 2013
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| Income Tax Disclosure [Abstract] |
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| Schedule of Income before Income Tax, Domestic and Foreign |
For the years ended December 31, 2013 and 2012, and the cumulative period from Inception through December 31, 2013, loss from continuing operations before taxes consists of the following: | | | For the year ended December 31, | | Cumulative from Inception through | | | | | 2013 | | 2012 | | December 31, 2013 | | | U.S. | | $ | (41,204) | | $ | (17,673) | | $ | (61,631) | | | Non-U.S. | | | (544) | | | (736) | | | (1,280) | | | | | $ | (41,748) | | $ | (18,409) | | $ | (62,911) | | |
| Schedule of Components of Income Tax Expense (Benefit) |
Income tax expense attributable to the operating loss of continuing and discontinued operations consists of the following: | | | For the year ended December 31, | | Cumulative from Inception through | | | | | 2013 | | 2012 | | December 31, 2013 | | | U.S. (continuing operations) | | | | | | | | | | | | Current | | $ | — | | $ | — | | $ | — | | | Deferred | | | — | | | — | | | — | | | | | | — | | | — | | | — | | | Non-U.S (discontinued operations) | | | | | | | | | | | | Current | | | (245) | | | (112) | | | (357) | | | Deferred | | | (12) | | | 57 | | | 45 | | | | | $ | (257) | | $ | (55) | | $ | (312) | | |
| Schedule of Effective Income Tax Rate Reconciliation |
Income tax expense attributable to continuing operations differed from the amounts computed by applying the U.S. federal income tax rate of 35% to loss from continuing operations before taxes on income as a result of the following: | | | For the year ended December 31, 2012 | | | Cumulative from Inception through December 31, | | | | | 2013 | | | 2012 | | | 2013 | | | Loss from continuing operations before taxes on income | | $ | (41,748) | | | $ | (18,409) | | | $ | (62,911) | | | Tax rate | | | 35 | % | | | 35 | % | | | 35 | % | | | | | | | | | | | | | | | | Computed "expected" tax benefit | | | 14,612 | | | | 6,443 | | | | 22,019 | | | Foreign tax rate differential | | | (122) | | | | (147) | | | | (269) | | | Change in valuation allowance | | | (17,085) | | | | (7,461) | | | | (25,777) | | | Nondeductible expenses | | | (125) | | | | (15) | | | | (140) | | | State and local income tax, net of federal income tax expense | | | 2,714 | | | | 1,197 | | | | 3,911 | | | Other items | | | 6 | | | | (17) | | | | 256 | | | Income tax expense attributable to continuing operations | | $ | — | | | $ | — | | | $ | — | | |
| Deferred Tax Assets and Liabilities |
These deferred tax assets (liabilities) arise from the following types of temporary differences: | | | For the year ended December 31, | | | | | 2013 | | 2012 | | | Deferred tax assets: | | | | | | | | | Acquired patents (see also Note 5) | | $ | — | | $ | 446 | | | Liability for accrued employee vacation and severance pay | | | 7 | | | 19 | | | Stock-based compensation | | | 8,104 | | | 4,590 | | | Net operating loss carryforwards | | | 36,605 | | | 23,127 | | | Total gross deferred tax assets | | | 44,716 | | | 28,182 | | | | | | | | | | | | Less: | | | | | | | | | Valuation allowance | | | (44,445) | | | (24,274) | | | Deferred tax liability for acquired technology (refer to Note 8): | | | (264) | | | (3,889) | | | | | | | | | | | | Net deferred tax assets | | $ | 7 | | $ | 19 | | |
| Summary of Valuation Allowance |
The following table presents the changes to valuation allowance during the periods presented: | | | Amount | | | As of Inception | | $ | — | | | Charged to cost and expenses | | | 1,231 | | | | | | | | | As of December 31, 2011 | | | 1,231 | | | Charged to cost and expenses | | | 12,240 | | | Acquisitions * | | | 10,803 | | | | | | | | | As of December 31, 2012 | | | 24,274 | | | Charged to cost and expenses – continuing operations | | | 17,085 | | | Charged to cost and expenses – discontinued operations | | | 3,086 | | | | | | | | | As of December 31, 2013 | | $ | 44,445 | | * As mentioned below, the NOL amounts are presented before Internal Revenue Code, Section 382 limitations. |