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Note 11 - Share-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2024
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
May 31, 2019
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Mar. 31, 2017
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number           3,801,059   3,801,059   4,657,635  
Share-Based Payment Arrangement, Expense           $ 242 $ 1,221 $ 918 $ 1,849    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross               735,000      
Share-Based Payment Arrangement, Option [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate               0.00% 0.00%    
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term               6 years 6 years 7 months 28 days    
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate               76.00% 49.00%    
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate               3.97% 3.64%    
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount           2,772   $ 2,772      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition               2 years 3 months 29 days      
Restricted Stock Units (RSUs) [Member]                      
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount           $ 2,206   $ 2,206      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition               5 years 2 months 8 days      
The 2017 Stock Incentive Plan [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized   9,000,000                 2,000,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized   1,500,000 1,500,000 1,900,000 2,100,000            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant           849,534   849,534      
The 2017 Stock Incentive Plan [Member] | Service-based Options [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number           2,510,893   2,510,893      
The 2017 Stock Incentive Plan [Member] | Performance-based Options [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number           1,290,166   1,290,166      
The 2017 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]                      
Share-Based Payment Arrangement, Expense           $ (33) 255 $ 434 $ 567    
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer and President [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross 632,911                    
Share Price $ 3.4                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term 10 years                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate 78.00%                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 4.10%                    
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer and President [Member] | Share-Based Payment Arrangement, Tranche One [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vesting, Sustained Market Capitalization $ 1,000,000                    
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period 4 years 3 months 18 days                    
The 2017 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]                      
Share-Based Payment Arrangement, Expense           $ 275 $ 966 $ 484 $ 1,282