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Note 10 - Equity Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended
Nov. 30, 2022
Sep. 30, 2022
Sep. 30, 2021
Share-Based Payment Arrangement, Expense   $ 0.6 $ 0.6
The 2019 Omnibus Award Plan [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant   1,253,908  
The 2019 Omnibus Award Plan [Member] | Performance Shares [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period   164,348  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 6.90  
The 2019 Omnibus Award Plan [Member] | Restricted Stock Units (RSUs) [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period   196,522  
Subsequent Event [Member] | The 2019 Omnibus Award Plan [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) 2,350,000