Annual report pursuant to Section 13 and 15(d)

Note 15 - Income Taxes (Details Textual)

v3.24.0.1
Note 15 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Current Federal, State and Local, Tax Expense (Benefit) $ 0  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 4,269 $ 740
Effective Income Tax Rate Reconciliation, GILTI, Amount 0 0
Deferred Tax Liabilities, Deferred Expense, Capitalized Research and Development Costs $ 4,700 3,300
Domestic Tax Authority [Member]    
Open Tax Year 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023  
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]    
Operating Loss Carryforwards $ 2,365  
Domestic Tax Authority [Member] | Generated Before 2018 [Member]    
Operating Loss Carryforwards   $ 120,792
Domestic Tax Authority [Member] | Generated After 2017 [Member]    
Operating Loss Carryforwards 76,059  
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards $ 128,455  
Open Tax Year 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023  
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]    
Operating Loss Carryforwards $ 752  
Foreign Tax Authority [Member]    
Operating Loss Carryforwards $ 12,829  
Foreign Tax Authority [Member] | Federal Ministry of Finance, Germany [Member]    
Open Tax Year 2018 2019 2020 2021 2022 2023  
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member]    
Open Tax Year 2019 2020 2021 2022 2023