Annual report pursuant to Section 13 and 15(d)

Note 8 - Income Taxes (Details Textual)

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Note 8 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 7,300  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total 0 $ 0
Deferred Tax Assets, Capitalized Research and Development 952 $ 0
Domestic Tax Authority [Member]    
Operating Loss Carryforwards $ 38,600  
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]    
Open Tax Year 2019 2020 2021 2022  
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards $ 42,400  
Open Tax Year 2019 2020 2021 2022  
Foreign Tax Authority [Member]    
Open Tax Year 2014 2015 2016 2017  
Foreign Tax Authority [Member] | Corporate Income Tax [Member]    
Operating Loss Carryforwards $ 163,300  
Foreign Tax Authority [Member] | Trade Tax [Member]    
Operating Loss Carryforwards $ 160,400