Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Stock-based Compensation (Details Textual)

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Note 11 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Feb. 06, 2023
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Jun. 01, 2021
Common Stock, No Par Value   $ 0   $ 0   $ 0  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)   113,333   113,333      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)       10 years      
Employee Stock Purchase Plan, Maximum Payroll Deduction, Percent   15.00%   15.00%      
Employee Stock Purchase Plan, Stock Purchase Price, Percent   85.00%   85.00%      
Common shares issued under the ESPP plan (Shares)       10,891 1,438    
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount   $ 862   $ 862      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       1 year 7 months 2 days      
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount   $ 2   $ 2      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number   812,000 711,000 812,000 711,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share)   $ 54.83 $ 59.61 $ 54.83 $ 59.61    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term       6 years 6 years 3 months 18 days    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term       7 years 2 months 4 days 7 years 2 months 12 days    
Share-based Payment Arrangement, Expense   $ 207 $ 769 $ 1,016 $ 2,643    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)       408,000 215,000    
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price       $ 2 $ 9.93    
Weighted average grant date fair value, exercise price       $ 9.9      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       0 38,000    
Common shares issued upon redemption of restricted share units, shares 38,000            
New Incentive Plan [Member]              
Common Stock, No Par Value             $ 0
New Incentive Plan [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)             691,400