Income Taxes (Notes)	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company uses an estimated annual effective tax rate, which is based on expected annual income, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates, to determine its quarterly provision for income taxes. Certain significant or unusual items are separately recognized in the quarter in which they occur and can be a source of variability in the effective tax rates from quarter to quarter. As of June 30, 2018, the Company recorded a full valuation allowance against all of its net deferred tax assets due to the uncertainty surrounding the Company’s ability to utilize these assets in the future. Due to the Company's losses, it only records a tax provision or benefit related to uncertain tax positions and related interest and minimum tax payments or refunds. The Company recorded income tax expense of $34,000 and $77,000 for the three months ended June 30, 2018 and 2017, and income tax expense of $54,000 and $78,000 for the six months ended June 30, 2018 and 2017, respectively. The Company continues to monitor guidance issued by the U.S. Treasury Department, the Internal Revenue Service, and other standard-setting bodies related to the Tax Cuts and Jobs Act, or the Jobs Act, enacted in 2017. Due to the timing of the enactment and the complexity involved in applying the provisions of the Jobs Act, the Company made reasonable estimates of the effects and recorded provisional amounts in the consolidated financial statements as of December 31, 2017. No adjustments were made to the provisional amounts recorded related to the Jobs Act during the six months ended June 30, 2018. The Company expects to complete the accounting for tax effects of the Jobs Act in fiscal year 2018. The Company is subject to taxation in the United States and in various state and foreign jurisdictions. The Company's federal and state returns since inception are subject to examination due to the carryover of net operating losses. As of June 30, 2018, the Company’s tax years from 2011 through 2012 are subject to examination by the United Kingdom tax authorities related to legacy operations. The statute of limitations for the assessment and collection of income taxes related to other foreign tax returns varies by country. In the foreign countries where we have operations, these time periods generally range from three to five years after the year for which the tax return is due or the tax is assessed.

Income Taxes

The Company uses an estimated annual effective tax rate, which is based on expected annual income, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates, to determine its quarterly provision for income taxes. Certain significant or unusual items are separately recognized in the quarter in which they occur and can be a source of variability in the effective tax rates from quarter to quarter.

As of June 30, 2018, the Company recorded a full valuation allowance against all of its net deferred tax assets due to the uncertainty surrounding the Company’s ability to utilize these assets in the future. Due to the Company's losses, it only records a tax provision or benefit related to uncertain tax positions and related interest and minimum tax payments or refunds. The Company recorded income tax expense of $34,000 and $77,000 for the three months ended June 30, 2018 and 2017, and income tax expense of $54,000 and $78,000 for the six months ended June 30, 2018 and 2017, respectively.

The Company continues to monitor guidance issued by the U.S. Treasury Department, the Internal Revenue Service, and other standard-setting bodies related to the Tax Cuts and Jobs Act, or the Jobs Act, enacted in 2017. Due to the timing of the enactment and the complexity involved in applying the provisions of the Jobs Act, the Company made reasonable estimates of the effects and recorded provisional amounts in the consolidated financial statements as of December 31, 2017. No adjustments were made to the provisional amounts recorded related to the Jobs Act during the six months ended June 30, 2018. The Company expects to complete the accounting for tax effects of the Jobs Act in fiscal year 2018.

The Company is subject to taxation in the United States and in various state and foreign jurisdictions. The Company's federal and state returns since inception are subject to examination due to the carryover of net operating losses. As of June 30, 2018, the Company’s tax years from 2011 through 2012 are subject to examination by the United Kingdom tax authorities related to legacy operations. The statute of limitations for the assessment and collection of income taxes related to other foreign tax returns varies by country. In the foreign countries where we have operations, these time periods generally range from three to five years after the year for which the tax return is due or the tax is assessed.