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Income Taxes	3 Months Ended
Mar. 31, 2014
Income Taxes	10. Income Taxes The Company computes its provision for income taxes by applying the estimated annual effective tax rate, adjusted for any material items. The Company’s effective tax rate for the three months ended March 31, 2014 was (210.0)%, which was lower than the federal statutory rate of 34% primarily due to research and development credits generated, non-deductible expenses, including stock-based compensation and stock-based compensation associated with the earn-out arrangement. The Company’s effective tax rate for the three months ended March 31, 2013 was (53.5)%, which was lower than the federal statutory rate of 34% primarily due to research and development credits generated, non-deductible expenses, including stock-based compensation and stock-based compensation associated with the earn-out arrangement.

Income Taxes

3 Months Ended

Mar. 31, 2014

10. Income Taxes

The Company computes its provision for income taxes by applying the estimated annual effective tax rate, adjusted for any material items. The Company’s effective tax rate for the three months ended March 31, 2014 was (210.0)%, which was lower than the federal statutory rate of 34% primarily due to research and development credits generated, non-deductible expenses, including stock-based compensation and stock-based compensation associated with the earn-out arrangement. The Company’s effective tax rate for the three months ended March 31, 2013 was (53.5)%, which was lower than the federal statutory rate of 34% primarily due to research and development credits generated, non-deductible expenses, including stock-based compensation and stock-based compensation associated with the earn-out arrangement.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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