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Note 15 - Income Tax (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Effective Income Tax Rate Reconciliation, Percent (6.30%) (33.50%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%
Deferred Tax Assets, Tax Credit Carryforwards $ 2,700  
Research and Development Tax Credit Carryforwards Offset by Reserve for Uncertain Tax Positions 300  
Deferred Tax Assets, Valuation Allowance 17,769 $ 15,222
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 2,500 700
Cash and Cash Equivalents, at Carrying Value 4,108 4,283
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 200  
Non-US [Member] | Subsidiaries [Member]    
Cash and Cash Equivalents, at Carrying Value 2,700 $ 2,100
Expire 2025 [Member] | Research Tax Credit Carryforward [Member]    
Tax Credit Carryforward, Amount 7,600  
Tax Credit Carryforward, Valuation Allowance 800  
Domestic Tax Jurisdiction [Member]    
Operating Loss Carryforwards $ 1,300  
Open Tax Year 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024  
State and Local Jurisdiction [Member]    
Open Tax Year 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024  
State and Local Jurisdiction [Member] | Expire Between 2025 and 2044 [Member]    
Operating Loss Carryforwards $ 8,400  
Foreign Tax Jurisdiction [Member]    
Operating Loss Carryforwards $ 7,800  
Open Tax Year 2020 2021 2022 2023 2024  
Foreign Tax Jurisdiction [Member] | Research Tax Credit Carryforward [Member]    
Tax Credit Carryforward, Amount $ 400