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Income Taxes
9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]  
Income Taxes

10. Income Taxes

During the three and nine months ended September 30, 2017, the Company recorded an income tax provision of $0.7 million and $1.3 million, respectively, representing an effective tax rate of -2.9%, and -2.0%, respectively. During the three and nine months ended September 30, 2016, the Company recorded an income tax provision of $8.0 thousand and $0.1 million, respectively, representing an effective tax rate of -0.1% and -0.2%, respectively. The income tax provision is primarily attributable to the year-to-date pre-tax income earned by the Company’s U.S. and U.K. subsidiaries. The difference in the statutory tax rate and effective tax rate is primarily a result of the jurisdictional mix of earnings and losses that are not benefited. The Company maintains a valuation allowance against certain deferred tax assets that are not more-likely-than-not realizable. As a result, the Company has not recognized a tax benefit related to losses generated in Switzerland in the current periods.