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Note 6 - Stock Based Compensation (Details Textual)
1 Months Ended 12 Months Ended
Jun. 30, 2023
$ / shares
shares
Jun. 30, 2022
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
shares
Oct. 31, 2024
shares
Share Based Compensation Arrangement by Share Based Payment Award, Options, Grants in Period, Aggregate Fair Value     $ 1,100,000 $ 700,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount     1,200,000 1,300,000  
Share-Based Payment Arrangement, Expense     1,726,000 1,984,000  
Equity Classified Warrants [Member]          
Share-Based Payment Arrangement, Expense     120,000 $ 196,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount     $ 234,000    
Share-Based Payment Arrangement, Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)     10 years    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount     $ 1,900,000    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)     2 years 8 months 12 days    
Share-Based Payment Arrangement, Option [Member] | Employees [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)     4 years    
Share-Based Payment Arrangement, Option [Member] | Director [Member] | Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)     1 year    
Share-Based Payment Arrangement, Option [Member] | Director [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)     3 years    
Restricted Stock Units (RSUs) [Member]          
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount     $ 1,300,000    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)     2 years 10 months 24 days    
Share Based Compensation Arrangement by Share Based Payment Award, Number of Installment Periods   4 4    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares 65,292 30,156 340,834    
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) | $ / shares $ 9 $ 22.35 $ 2.48    
Performance-based Restricted Stock Units [Member] | Executive Officer [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares       73,334  
The 2024 Stock Plan [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) | shares         1,000,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) | shares     119,166