Annual report pursuant to Section 13 and 15(d)

Note 14 - Stock-based Compensation (Details Textual)

v3.24.0.1
Note 14 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2014
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 3,724,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) 0 0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 0 0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) $ 0 $ 0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value $ 58 $ 428  
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 50.00%    
Restricted Stock Units (RSUs) [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 1,023,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) $ 1.29    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested $ 1,612    
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount $ 1,383    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 1 year 4 months 17 days    
Equity Incentive Plan 2014 [Member]      
Common Stock, Capital Shares Reserved for Future Issuance (in shares) 137,000   137,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 3,724,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 277,000 50,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) 4 years    
Equity Incentive Plan 2014 [Member] | Minimum [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent 100.00%    
Equity Incentive Plan 2014 [Member] | Maximum [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) 10 years    
Employee Stock Purchase Plan [Member]      
Common Stock, Capital Shares Reserved for Future Issuance (in shares) 33    
Defined Contribution Plan, Employer Matching Contribution, Percent of Match   25.00%  
Employee Stock Purchase Plan [Member] | End of Offering Period [Member]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Match   85.00%