Income Taxes	3 Months Ended
Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes In determining quarterly provisions for income taxes, the Company uses the annual estimated effective tax rate applied to the actual year-to-date income. The Company’s annual estimated effective tax rate differs from the statutory rate primarily as a result of state taxes, foreign taxes, nondeductible stock option expenses, and changes in the Company’s valuation allowance. The Company recorded an income tax benefit of $4.3 million and a tax provision $0.1 million for the three months ended March 31, 2016 and 2015, respectively. The tax benefit during the three months ended March 31, 2016 is the result of net operating losses generated by the Canadian operations, including the impact of the amortization of acquisition related intangibles, as well as the geographical mix of income and losses. Due to uncertainty as to the realization of benefits from the Company's domestic and certain international net deferred tax assets, including net operating loss carryforwards and research and development tax credits, the Company has a full valuation allowance reserved against such net deferred tax assets. The Company intends to continue to maintain a full valuation allowance on the net deferred tax assets until there is sufficient evidence to support the reversal of all or some portion of these allowances. There were no material changes to the Company's unrecognized tax benefits in the three months ended March 31, 2016, and the Company does not expect to have any significant changes to unrecognized tax benefits through the end of the fiscal year. Because of the Company's history of tax losses, all years remain open to tax audit.

Income Taxes

3 Months Ended

Mar. 31, 2016

In determining quarterly provisions for income taxes, the Company uses the annual estimated effective tax rate applied to the actual year-to-date income. The Company’s annual estimated effective tax rate differs from the statutory rate primarily as a result of state taxes, foreign taxes, nondeductible stock option expenses, and changes in the Company’s valuation allowance.

The Company recorded an income tax benefit of $4.3 million and a tax provision $0.1 million for the three months ended March 31, 2016 and 2015, respectively. The tax benefit during the three months ended March 31, 2016 is the result of net operating losses generated by the Canadian operations, including the impact of the amortization of acquisition related intangibles, as well as the geographical mix of income and losses.

Due to uncertainty as to the realization of benefits from the Company's domestic and certain international net deferred tax assets, including net operating loss carryforwards and research and development tax credits, the Company has a full valuation allowance reserved against such net deferred tax assets. The Company intends to continue to maintain a full valuation allowance on the net deferred tax assets until there is sufficient evidence to support the reversal of all or some portion of these allowances.

There were no material changes to the Company's unrecognized tax benefits in the three months ended March 31, 2016, and the Company does not expect to have any significant changes to unrecognized tax benefits through the end of the fiscal year. Because of the Company's history of tax losses, all years remain open to tax audit.