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Note 16 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
May 26, 2023
May 14, 2021
Sep. 30, 2023
Sep. 30, 2022
Jun. 30, 2023
Sep. 30, 2023
Sep. 30, 2022
Mar. 24, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)           6,691    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)           (0)    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)     6,470     6,470    
Former Chief Financial Officer [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Accelerated Vesting, Percentage Outstanding 50.00%              
Share-Based Payment Arrangement, Accelerated Cost $ 320              
Supplemental Unemployment Benefits, Severance Benefits $ 554              
Share-Based Payment Arrangement, Option [Member]                
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount     $ 4,372     $ 4,372    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)           2 years 3 months 10 days    
The 2020 Stock Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)               3,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares)   15,000            
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)     0 30   6,691 3,879  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)       $ 0.92   $ 0.69 $ 0.99  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)     0 0 0   0  
The 2020 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)     1,979     1,979