Annual report pursuant to Section 13 and 15(d)

Note 10 - Stock-based Compensation (Details Textual)

v3.23.2
Note 10 - Stock-based Compensation (Details Textual) - USD ($)
 1 Months Ended 12 Months Ended
Feb. 21, 2023
May 01, 2022
Mar. 01, 2022
Feb. 28, 2023
Aug. 31, 2022
Jun. 30, 2022
Aug. 31, 2021
Apr. 02, 2023
Apr. 03, 2022
Statement [Line Items]                  
Common Stock, Capital Shares Reserved for Future Issuance (in shares)               765,000  
Share-Based Payment Arrangement, Expense               $ 1,100,000 $ 834,000
Share-Based Payment Arrangement, Amount Capitalized               0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value               87,000 205,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value               127,000 541,000
Payment, Tax Withholding, Share-Based Payment Arrangement               10,000 67,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value               $ 87,000 126,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Month)               11 months 9 days  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount               $ 561,000  
Share-Based Payment Arrangement, Option [Member]                  
Statement [Line Items]                  
Share-Based Payment Arrangement, Expense               $ 212,000 $ 181,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)               2 years  
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount               $ 98,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Month)               5 months 24 days  
Non-vested Stock Grants [Member] | Non Employee Directors [Member]                  
Statement [Line Items]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Accelerated Vesting, Number (in shares) 11,724 8,033              
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested $ 67,000 $ 50,000     $ 331,000   $ 327,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)         52,856   43,984    
Non-vested Stock Grants [Member] | Employee [Member]                  
Statement [Line Items]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested       $ 57,000   $ 293,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)       10,000   45,000      
Performance Shares [Member]                  
Statement [Line Items]                  
Share Based Compensation Arrangement By Share Based Payment Award Equity Instrument Other Than Options Grants In Period Total Grant Date Fair Value     $ 732,000            
Performance Shares [Member] | Executive Officer [Member]                  
Statement [Line Items]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)     187,500            
Performance Shares [Member] | Executive Officer [Member] | Share-Based Payment Arrangement, Tranche One [Member]                  
Statement [Line Items]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)     75,000            
Share Based Compensation, Grant Conditions, Minimum Per-Share Price (in dollars per share)     $ 8.00            
Share Based Compensation, Grant Conditions, Trading Period (Day)     10 days            
Performance Shares [Member] | Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                  
Statement [Line Items]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)     112,500            
Share Based Compensation, Grant Conditions, Minimum Per-Share Price (in dollars per share)     $ 9.00            
Share Based Compensation, Grant Conditions, Trading Period (Day)     10 days