Income Taxes	6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	On an interim basis, the Company estimates what its anticipated annual effective tax rate will be and records a quarterly income tax provision in accordance with the estimated annual rate, adjusted accordingly by the tax effect of certain discrete items that arise during the quarter. As the year progresses, the Company refines its estimated annual effective tax rate based on actual year-to-date results. This process can result in significant changes to the Company's estimated effective tax rate. When such activity occurs, the income tax provision is adjusted during the quarter in which the estimates are refined and adjusted. As such, the Company's year-to-date tax provision reflects the estimated annual effective tax rate. Therefore, these changes along with the adjustments to the Company's deferred taxes and related valuation allowance, may create fluctuations in the overall effective tax rate from period to period. Due to overall cumulative losses incurred in recent years, the Company maintained a valuation allowance against its deferred tax assets as of June 30, 2019 and December 31, 2018. The Company’s effective tax rate for the six months ended June 30, 2019 differed from the U.S. federal statutory rate primarily due to operating losses that receive no tax benefit as a result of a valuation allowance recorded against the Company's existing tax assets. The total amount of unrecognized tax benefits, excluding associated interest and penalties, was $0.5 million as of June 30, 2019, all of which, if subsequently recognized, would have affected the Company's tax rate. As of June 30, 2019 and December 31, 2018, there was no balance of accrued interest and penalties related to uncertain tax positions. The Company recognizes interest and penalties related to uncertain tax positions as a component of income tax expense, and the accrued interest and penalties are included in deferred and other current liabilities in the Company’s condensed consolidated balance sheets. There were no material interest or penalties included in income tax expenses for the three and six months ended June 30, 2019 and 2018. The Company is subject to taxation in the U.S. and in various foreign and state jurisdictions. Due to expired statutes of limitation, the Company’s federal income tax returns for years prior to calendar year 2015 are not subject to examination by the U.S. Internal Revenue Service. Generally, for the majority of state jurisdictions where the Company does business, periods prior to calendar year 2014 are no longer subject to examination. The Company does not anticipate a significant change to the total amount of unrecognized tax benefits within the next twelve months.

Income Taxes

6 Months Ended

Jun. 30, 2019

On an interim basis, the Company estimates what its anticipated annual effective tax rate will be and records a quarterly income tax provision in accordance with the estimated annual rate, adjusted accordingly by the tax effect of certain discrete items that arise during the quarter. As the year progresses, the Company refines its estimated annual effective tax rate based on actual year-to-date results. This process can result in significant changes to the Company's estimated effective tax rate. When such activity occurs, the income tax provision is adjusted during the quarter in which the estimates are refined and adjusted. As such, the Company's year-to-date tax provision reflects the estimated annual effective tax rate. Therefore, these changes along with the adjustments to the Company's deferred taxes and related valuation allowance, may create fluctuations in the overall effective tax rate from period to period.

Due to overall cumulative losses incurred in recent years, the Company maintained a valuation allowance against its deferred tax assets as of June 30, 2019 and December 31, 2018.

The Company’s effective tax rate for the six months ended June 30, 2019 differed from the U.S. federal statutory rate primarily due to operating losses that receive no tax benefit as a result of a valuation allowance recorded against the Company's existing tax assets.

The total amount of unrecognized tax benefits, excluding associated interest and penalties, was $0.5 million as of June 30, 2019, all of which, if subsequently recognized, would have affected the Company's tax rate.

As of June 30, 2019 and December 31, 2018, there was no balance of accrued interest and penalties related to uncertain tax positions. The Company recognizes interest and penalties related to uncertain tax positions as a component of income tax expense, and the accrued interest and penalties are included in deferred and other current liabilities in the Company’s condensed consolidated balance sheets. There were no material interest or penalties included in income tax expenses for the three and six months ended June 30, 2019 and 2018.

The Company is subject to taxation in the U.S. and in various foreign and state jurisdictions. Due to expired statutes of limitation, the Company’s federal income tax returns for years prior to calendar year 2015 are not subject to examination by the U.S. Internal Revenue Service. Generally, for the majority of state jurisdictions where the Company does business, periods prior to calendar year 2014 are no longer subject to examination. The Company does not anticipate a significant change to the total amount of unrecognized tax benefits within the next twelve months.