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Income Taxes
9 Months Ended
Sep. 30, 2021
Income Taxes [Abstract]  
Income Taxes
6. Income Taxes

The effective tax rate (“ETR”) for the three months ended September 30, 2021 and 2020 was 0.0% and 18.8%, respectively, and the ETR for the nine months ended September 30, 2021 and 2020 was 0.0% and 27.7%, respectively. For the three months and nine months ended September 30, 2021, the ETR decrease was primarily related to a net operating loss increase offset by the recording of a valuation allowance against the net deferred tax assets.