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Income Taxes
 6 Months Ended
Jun. 30, 2023
Income Taxes [Abstract]  
Income Taxes
Note 3 — Income Taxes

For the three months ended June 30, 2023, we recognized no income tax on loss before taxes of $11,379, which is an effective tax rate of 0.0%. For the six months ended June 30, 2023, we recognized an income tax benefit of $78 on loss of $15,924, which is an effective tax rate of 0.49%. The effective rate is lower than the statutory federal rate primarily due to the change in valuation allowance. For the three months ended June 30, 2022, we recognized an income tax expense of $373 on loss before taxes of $4,064, an effective tax rate of 9.18%. For the six months ended June 30, 2022, we recognized an income tax benefit of $684 on loss before taxes of $8,441, which is an effective tax rate of 8.10%. The effective rate is lower than the statutory federal rate primarily due to the effect of stock-based compensation and expiring options, requiring us to reduce our deferred tax asset. Management provided a full valuation allowance against net deferred income tax assets at June 30, 2023.

Our tax years for 2005 and forward are subject to examination by the U.S. tax authority and various state tax authorities because we utilized the NOLs and tax credits generated in those years in 2020. The statute of limitation for those years shall expire three years after the date of filing 2020 income tax returns.

We are required to recognize the financial statement effects of a tax position when it is more likely than not, based on the technical merits, that the position will be sustained upon examination. At December 31, 2022 and June 30, 2023, we have no uncertain tax positions. Our policy is to recognize interest and penalties accrued on uncertain tax positions as a component of income tax expense. We had no accrued interest or penalties related to uncertain tax positions at June 30, 2023.