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Note 12 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Mar. 31, 2026
Jan. 31, 2026
Mar. 31, 2017
Mar. 31, 2026
Mar. 31, 2025
Jan. 31, 2017
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)       0 0  
Employees and Directors [Member]            
Share-Based Payment Arrangement, Expense       $ 25 $ 2  
Share-Based Payment Arrangement, Nonemployee [Member]            
Share-Based Payment Arrangement, Expense         $ 0  
The 2026 Plan [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized   22,223,927        
Share-based Compensation Arrangement by Share-based Payment Award, Annual Increase in Shares Authorized, Percentage of Outstanding Common Stock           4.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant 539,491     539,491    
The 2026 Plan [Member] | Incentive Stock Options (ISOs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percentage of Stock Owned by Shareholder, Minimum   10.00%   10.00%    
The 2026 Plan [Member] | Minimum [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent   100.00%        
The 2026 Plan [Member] | Minimum [Member] | Incentive Stock Options (ISOs) [Member] | Shareholder of More Than 10% [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent   110.00%        
The 2026 Plan [Member] | Maximum [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period   10 years        
The 2026 Plan [Member] | Maximum [Member] | Incentive Stock Options (ISOs) [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period   5 years        
The 2007 Omnibus Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period       10 years    
The 2017 Omnibus Incentive Plan [Member] | Incentive Stock Options (ISOs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percentage of Stock Owned by Shareholder, Minimum     10.00%      
The 2017 Omnibus Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period       4 years    
The 2017 Omnibus Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Nonemployee [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period       1 year    
The 2017 Omnibus Incentive Plan [Member] | Minimum [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent     100.00%      
The 2017 Omnibus Incentive Plan [Member] | Minimum [Member] | Incentive Stock Options (ISOs) [Member] | Shareholder of More Than 10% [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent     110.00%      
The 2017 Omnibus Incentive Plan [Member] | Maximum [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period     10 years      
The 2017 Omnibus Incentive Plan [Member] | Maximum [Member] | Incentive Stock Options (ISOs) [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period     5 years      
The 2026 Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) 21,684,436          
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 20,400     $ 20,400    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 2 years 2 months 12 days          
The 2026 Equity Incentive Plan [Member] | Time Based RSUs [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) 6,238,828          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) $ 1.43          
The 2026 Equity Incentive Plan [Member] | Performance Based RSUs [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) 15,445,608          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) $ 1.49          
The 2026 Equity Incentive Plan [Member] | VWAP RSUs [Member]            
Share-Based Compensation Arrangements by Share-Based Payment Award, Equity Instruments Other Than Options, Volume-Weighted Average Price Threshold One (in dollars per share) 1.7     $ 1.7    
Share-Based Compensation Arrangements by Share-Based Payment Award, Equity Instruments Other Than Options, Volume-Weighted Average Price Threshold Two (in dollars per share) 2.55     2.55    
Share-Based Compensation Arrangements by Share-Based Payment Award Equity Instruments Other Than Options Volume-Weighted Average Price Threshold Three (in dollars per share) $ 5.1     $ 5.1    
Share-Based Compensation Arrangements by Share-Based Payment Award, Equity Instruments Other Than Options, First Threshold, Value $ 250,000     $ 250,000    
Share-Based Compensation Arrangements by Share-Based Payment Award, Equity Instruments Other Than Options, Second Threshold, Value 400,000     400,000    
Share-Based Compensation Arrangements by Share-Based Payment Award, Equity Instruments Other Than Options, Third Threshold, Value $ 800,000     $ 800,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate 157.00%          
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 3.90%          
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00%          
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term 3 years          
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price $ 1.49     $ 1.49