v3.25.2
Note 12 - Income Taxes (Details Textual)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Income Tax Expense (Benefit) $ 33 $ 53 $ 69 $ 92  
Operating Loss Carryforwards         $ 295,198
Operating Loss Carryforwards, Subject to Expiration         $ 227,781
Operating Loss Carry Forwards Annual Limit 14,284   14,284    
Unrecognized Tax Benefits 0   0    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued $ 0   $ 0    
Rights [Member]          
Threshold Percentage of Beneficial Ownership for Significant Dilution in Ownership Interest     4.90%    
Class of Warrant or Right Number of Rights Per Common Stock Share     1    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares 0.001   0.001    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 7.7   $ 7.7    
Class of Warrant or Right Current Beneficial Ownership Percentage That Will Not Trigger Preferred Share Purchase Rights     4.90%