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Note 13 - Equity-based Compensation (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Mar. 31, 2023
Mar. 31, 2017
Oct. 31, 2007
Mar. 31, 2023
Sep. 30, 2022
Mar. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)         0  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 300     $ 300    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       2 years 21 days    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)       4,000    
Share-Based Payment Arrangement, Expense           $ 184
Employees and Directors [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)       3,650   9,486
Share-Based Payment Arrangement, Option [Member]            
Share-Based Payment Arrangement, Expense       $ 75   $ 184
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Nonemployee [Member]            
Share-Based Payment Arrangement, Expense       $ 0   $ 0
The 2007 Omnibus Incentive Plan [Member] | Maximum [Member] | Incentive Stock Options (ISOs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)     10 years      
The 2017 Omnibus Incentive Plan [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)   66,243        
Share-based Compensation Arrangement by Share-based Payment Award, Annual Increase in Shares Authorized, Percentage of Outstanding Common Stock   4.00%        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) 81,417          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 180,143     180,143    
The 2017 Omnibus Incentive Plan [Member] | Incentive Stock Options (ISOs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percentage of Stock Owned by Shareholder, Minimum   10.00%        
The 2017 Omnibus Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)   4 years        
The 2017 Omnibus Incentive Plan [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)   10 years        
The 2017 Omnibus Incentive Plan [Member] | Maximum [Member] | Incentive Stock Options (ISOs) [Member] | Shareholder of More Than 10% [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)   5 years        
The 2017 Omnibus Incentive Plan [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent   100.00%        
The 2017 Omnibus Incentive Plan [Member] | Minimum [Member] | Incentive Stock Options (ISOs) [Member] | Shareholder of More Than 10% [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent   110.00%