Income Taxes	3 Months Ended
Mar. 31, 2018
Income Taxes
Income Taxes	Note 11. Income Taxes During the three months ended March 31, 2018 and 2017, we recorded an income tax provision of $3.6 million and $11 thousand, respectively. The change in the income tax provision for the current quarter compared to the prior year was primarily due to the release of a significant portion of our valuation allowance in the fourth quarter of 2017. Prior to the release of the valuation allowance, the Company reported in its consolidated statements of operations only the amount of taxes actually payable. Subsequent to the release of the valuation allowance, tax expense also reflects the tax liability that would be payable without consideration of the usage of any net operating loss carryforwards. We have significant net operating loss carryforwards in the United States and certain European jurisdictions, and, as a result, we do not currently pay significant income taxes in those jurisdictions. At December 31, 2017, the Company had $90.3 million of deferred tax assets worldwide relating to net operating loss carryforwards, tax credit carryforwards and other temporary differences, which are available to reduce income tax liabilities in future years. On December 22, 2017, the Tax Cuts and Jobs Act ("TCJA") was enacted into law, which significantly changed existing U.S. tax law and includes numerous provisions that affect our business, such as reducing the U.S. federal statutory tax rate and adopting a territorial tax system. The TCJA reduces the U.S. federal statutory tax rate from 35% to 21%, effective January 1, 2018. The TCJA also includes a provision to tax global intangible low-taxed income ("GILTI") of foreign subsidiaries and a base erosion anti-abuse tax ("BEAT") measure that taxes certain payments between a U.S. corporation and its subsidiaries. The Company considered the available guidance and has incorporated the relevant provisions of GILTI into the income tax provision and concluded that the provisions of BEAT do not apply to the Company at this time. In accordance with Staff Accounting Bulletin (“SAB”) 118, the Company disclosed in its 2017 Annual Report on Form 10-K that it is able to determine a reasonable estimate for certain effects of tax reform and has recorded that estimate as a provisional amount. The Company intends to use the one-year measurement period to update the provisional amount recorded as it finalizes its analysis relating to certain matters, such as developing interpretations of provisions to the TCJA, changes to certain estimates and amounts related to the Earning and Profits of certain subsidiaries and the filing of tax returns. Also, Treasury regulations, administrative interpretations, or court decisions interpreting the TCJA may require further adjustments and changes to the provisional amounts. As of the first quarter 2018, the Company has not made any changes to its estimate for the transition tax liability.

Note 11. Income Taxes

During the three months ended March 31, 2018 and 2017, we recorded an income tax provision of $3.6 million and $11 thousand, respectively. The change in the income tax provision for the current quarter compared to the prior year was primarily due to the release of a significant portion of our valuation allowance in the fourth quarter of 2017. Prior to the release of the valuation allowance, the Company reported in its consolidated statements of operations only the amount of taxes actually payable. Subsequent to the release of the valuation allowance, tax expense also reflects the tax liability that would be payable without consideration of the usage of any net operating loss carryforwards. We have significant net operating loss carryforwards in the United States and certain European jurisdictions, and, as a result, we do not currently pay significant income taxes in those jurisdictions.

At December 31, 2017, the Company had $90.3 million of deferred tax assets worldwide relating to net operating loss carryforwards, tax credit carryforwards and other temporary differences, which are available to reduce income tax liabilities in future years.

On December 22, 2017, the Tax Cuts and Jobs Act ("TCJA") was enacted into law, which significantly changed existing U.S. tax law and includes numerous provisions that affect our business, such as reducing the U.S. federal statutory tax rate and adopting a territorial tax system. The TCJA reduces the U.S. federal statutory tax rate from 35% to 21%, effective January 1, 2018. The TCJA also includes a provision to tax global intangible low-taxed income ("GILTI") of foreign subsidiaries and a base erosion anti-abuse tax ("BEAT") measure that taxes certain payments between a U.S. corporation and its subsidiaries. The Company considered the available guidance and has incorporated the relevant provisions of GILTI into the income tax provision and concluded that the provisions of BEAT do not apply to the Company at this time.

In accordance with Staff Accounting Bulletin (“SAB”) 118, the Company disclosed in its 2017 Annual Report on Form 10-K that it is able to determine a reasonable estimate for certain effects of tax reform and has recorded that estimate as a provisional amount. The Company intends to use the one-year measurement period to update the provisional amount recorded as it finalizes its analysis relating to certain matters, such as developing interpretations of provisions to the TCJA, changes to certain estimates and amounts related to the Earning and Profits of certain subsidiaries and the filing of tax returns. Also, Treasury regulations, administrative interpretations, or court decisions interpreting the TCJA may require further adjustments and changes to the provisional amounts. As of the first quarter 2018, the Company has not made any changes to its estimate for the transition tax liability.