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Income Taxes
3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]  
Income Taxes

6.

Income Taxes

The provision for income taxes for the three months ended March 31, 2017 was due to foreign taxes. The benefit from income taxes for the three months ended March 31, 2016 was primarily due to the discrete tax effect arising from other comprehensive income related to available-for-sale securities.

Based upon the weight of available evidence, which includes its historical operating performance, reported cumulative net losses since inception and expected continuing net loss, the Company has established and continue to maintain a full valuation allowance against its deferred tax assets as it does not currently believe that realization of those assets is more likely than not.