Annual report pursuant to Section 13 and 15(d)

Note 9 - Stock-based Compensation (Details Textual)

v3.22.1
Note 9 - Stock-based Compensation (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Mar. 01, 2022
Jan. 18, 2019
Aug. 31, 2021
Aug. 31, 2020
Apr. 03, 2022
Mar. 28, 2021
Common Stock, Capital Shares Reserved for Future Issuance (in shares)         972,000  
Share-Based Payment Arrangement, Expense         $ 834,000 $ 394,000
Share-based Payment Arrangement, Amount Capitalized         0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value         205,000 668,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value         126,000 139,000
Proceeds from Stock Options Exercised         0 0
Payment, Tax Withholding, Share-based Payment Arrangement         $ 67,000 162,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Month)         15 months 9 days  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total         $ 941,000  
Share-Based Payment Arrangement, Option [Member]            
Share-Based Payment Arrangement, Expense         $ 181,000 $ 63,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)         2 years 2 years
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount         $ 202,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Month)         7 months 3 days  
Non-vested Stock Grants [Member] | Non Employee Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)     43,984 37,256    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested   $ 182,000 $ 327,000 $ 179,000    
Performance Shares [Member]            
Share Based Compensation Arrangement By Share Based Payment Award Equity Instrument Other Than Options Grants In Period Total Grant Date Fair Value         $ 734,000  
Performance Shares [Member] | Share-Based Payment Arrangement, Tranche One [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.33%          
Performance Shares [Member] | Share-Based Payment Arrangement, Tranche Two [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.33%          
Performance Shares [Member] | Share-Based Payment Arrangement, Tranche Three [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.33%          
Performance Shares [Member] | Executive Officer [Member]            
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]            
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]            
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