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Income Taxes
3 Months Ended
Mar. 31, 2021
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The Company's anticipated annual tax rate is impacted primarily by the amount of taxable income associated with each jurisdiction in which its income is subject to income tax, permanent differences between the financial statement carrying amounts and tax bases of assets and liabilities.

During the three months ended March 31, 2021, and 2020, the Company incurred no income tax expense or benefit. The effective tax rate for the three months ended March 31, 2021, and 2020, was 0%. The effective tax rates differed from the statutory rate during each period primarily due to changes in the valuation allowance established to offset net deferred tax assets.