v3.25.4
Note 15 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Effective Income Tax Rate Reconciliation, Percent 0.00% 0.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%
Deferred Tax Assets, Valuation Allowance $ 112,746 $ 104,361
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 8,385  
Deferred Tax Assets, Operating Loss Carryforwards, Domestic 289,499  
Deferred Tax Assets, Operating Loss Carryforwards, State and Local 177,072  
Deferred Tax Assets, Operating Loss Carryforwards, Foreign $ 80,051  
Federal Net Operating Loss Carryforwards, Expiration Period Minimum (Year) 5 years  
Federal Tax Credit CarryForward, Expiration Period, Maximum (Year) 20 years  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total $ 0 $ 0
Domestic Tax Jurisdiction [Member]    
Open Tax Year 2022 2023 2024  
State and Local Jurisdiction [Member]    
Open Tax Year 2022 2023 2024  
Foreign Tax Jurisdiction [Member]    
Open Tax Year 2024  
Research Tax Credit Carryforward [Member] | Domestic Tax Jurisdiction [Member]    
Tax Credit Carryforward, Amount $ 15,832