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Note 7 - Income Taxes | 9 Months Ended
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Sep. 30, 2024
Notes to Financial Statements |
Income Tax Disclosure [Text Block] | 7. Income taxes The Company is subject to federal and state income taxes in the United States. The tax provision for interim periods is determined using an estimate of the Company's annual effective tax rate ("AETR"). The Company updates its estimated AETR on a quarterly basis and, if the estimate changes, a cumulative adjustment is made. As of September 30, 2024 and December 31, 2023, the Company recorded a full valuation allowance against net deferred tax assets and intends to continue maintaining a full valuation allowance on these net deferred tax assets until there is sufficient evidence to support the release of all or a portion of these allowances. Release of some or all of the valuation allowance would result in the recognition of certain deferred tax assets and an increase in deferred tax benefit for any period in which such a release may be recorded. However, the exact timing and amount of any valuation allowance release are subject to change, depending upon the level of profitability that the Company is able to achieve and the net deferred tax assets available. For the nine months ended September 30, 2024, the Company's effective income tax rate of 0.4% differed from the statutory federal income tax rate of 21% primarily due to state and local tax expense and losses for which no tax benefit is recognized as such amounts are fully offset with a valuation allowance. For the nine months ended September 30, 2023, the Company's effective income tax rate of 0.9% primarily represents the projected federal and state cash tax expense expected to result in taxable income for full-year 2023 after the impact of a non-deductible goodwill impairment against pre-tax year-to-date losses, offset by the benefit of federal research and development credits on expected federal cash tax expense. The Company assesses its income tax positions and records tax benefits for all years subject to examination based upon its evaluation of the facts, circumstances, and information available as of the reporting dates. For those tax positions where it is more-likely-than-not that a tax benefit will be sustained, the Company has recorded the largest amount of tax benefit with a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is not more-likely-than-not that a tax benefit will be sustained, no tax benefit has been recognized in the Company's financial statements. As of September 30, 2024 and December 31, 2023, the balance of unrecognized tax benefits was $1,480. If the Company's tax positions are ultimately sustained, the Company's liability would be reduced by $1,480, all of which would impact the Company's tax provision. As of September 30, 2024, the Company has not accrued any interest or penalties with respect to its uncertain tax positions. The Company is reasonably certain that all of its uncertain tax positions will reverse within the next twelve months due to the closing of the statute of limitations.

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