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Income Taxes
3 Months Ended
Mar. 31, 2021
Income Tax Disclosure [Abstract]  
Income Taxes

10. Income Taxes

The Company’s effective tax rate was 0.8% and 36.1% during the three months ended March 31, 2021 and 2020, respectively, for an income tax benefit in all periods presented. The effective income tax rate for the three months ended March 31, 2021 reflects the impact of the full valuation allowance against U.S. deferred tax assets as of March 31, 2021. On March 27, 2020, Congress enacted the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”), which includes provisions, among others, that allow the Company to carryback net operating losses to a year with a higher federal income tax rate and technical corrections to tax depreciation methods for qualified improvement property. The income tax benefit for the three months ended March 31, 2020 included a $6.8 million benefit related to net operating losses that can now be carried back as a result of the CARES Act, partially offset by tax deficiencies on stock-based compensation of $2.5 million (see Note 9, Stock-Based Compensation, for additional details).

The Company is currently under examination by the Internal Revenue Service for its federal income tax return for the tax year ended December 31, 2017. The Company does not believe, but cannot predict with certainty, that there will not be any additional tax liabilities, penalties and/or interest as a result of the audit.