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Note 16 - Income Taxes | 9 Months Ended
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Sep. 30, 2023
Notes to Financial Statements |
Income Tax Disclosure [Text Block] | Note 16. Income Taxes ​​ For the three months ended September 30, 2023 and 2022, the effective tax rate varied from the federal statutory rate of 21% primarily due to the change of the valuation allowance on federal, state, Taiwan, and China deferred tax assets ("DTA"). The Company continually monitors and performs an assessment of the realizability of its DTAs, including an analysis of factors such as future taxable income, reversal of existing taxable temporary differences, and tax planning strategies. In assessing the need for a valuation allowance, the Company considered both positive and negative evidence related to the likelihood of realization of deferred tax assets using a “more likely than not” standard. In making such assessment, more weight was given to evidence that could be objectively verified, including recent cumulative losses. Based on the Company’s review of this evidence, management determined that a full valuation allowance against all of the Company’s net deferred tax assets at September 30, 2023 was appropriate.

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