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Note 13 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Unrecognized Tax Benefits $ 0 $ 0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 4,500  
Domestic Tax Jurisdiction [Member]    
Operating Loss Carryforwards 38,700  
Domestic Tax Jurisdiction [Member] | Research Tax Credit Carryforward [Member]    
Tax Credit Carryforward, Amount 1,100  
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards 36,600  
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]    
Tax Credit Carryforward, Amount $ 100