Income Taxes	3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s effective income tax rate was 1.9% and 2.9% for the three months ended March 31, 2017 and 2016, respectively. The Company’s effective income tax rates are significantly lower than the statutory tax rate primarily due to an increase in the Company’s valuation allowance related to its U.S.-based deferred tax amounts, resulting from carryforward net operating losses generated during the three months ended March 31, 2017 and 2016. Pursuant to Internal Revenue Code Sections 382 and 383, annual use of the Company’s net operating loss and research and development credit carryforwards may be limited in the event a cumulative change in ownership of more than 50% occurs within a three-year period.

Income Taxes

3 Months Ended

Mar. 31, 2017

The Company’s effective income tax rate was 1.9% and 2.9% for the three months ended March 31, 2017 and 2016, respectively. The Company’s effective income tax rates are significantly lower than the statutory tax rate primarily due to an increase in the Company’s valuation allowance related to its U.S.-based deferred tax amounts, resulting from carryforward net operating losses generated during the three months ended March 31, 2017 and 2016. Pursuant to Internal Revenue Code Sections 382 and 383, annual use of the Company’s net operating loss and research and development credit carryforwards may be limited in the event a cumulative change in ownership of more than 50% occurs within a three-year period.