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Income Tax
 3 Months Ended
Mar. 31, 2022
Income Tax Disclosure [Abstract]  
Income Tax

9.    Income Tax

The estimated annual effective income tax benefit rate for the current quarter and the prior year quarter was approximately 0% and 5%, respectively, resulting in an income tax benefit of $0 and $0.14 million, respectively.

For the current quarter, the federal statutory rate differed from the effective tax rate primarily due to the recording of a valuation allowance against the current period loss. Since it is not more likely than not that the current period loss will be utilized, the Company recorded the valuation allowance.

For the prior year quarter, the federal statutory rate differed from the effective tax rate primarily due to recurring permanent differences, which decreased the effective tax rate by approximately 17%, partially offset by state taxes, which increased the effective tax rate by approximately 1%.

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