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Income Taxes
9 Months Ended
Sep. 30, 2022
Income Taxes [Abstract]  
Income Taxes
6. Income Taxes

The effective tax rate (“ETR”) for the three months ended September 30, 2022 and 2021 was 0.0% and 0.0%, respectively, and the ETR for the nine months ended September 30, 2022 and 2021 was 0.0% and 0.0%, respectively. The ETR differs from the U.S. corporate rate of 21% for all periods due to state taxes and a valuation allowance recorded on the deferred tax assets, mainly net operating loss carryforwards.