Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Stock-based Compensation (Details Textual)

v3.25.0.1
Note 7 - Stock-based Compensation (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Jun. 30, 2024
Share-Based Payment Arrangement, Expense $ 1,139,000 $ 1,271,000      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 8,910,000 $ 8,668,000 $ 8,910,000 $ 8,668,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 2 years 10 months 24 days 2 years 10 months 24 days      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross 38,198 111,299      
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 30.9 $ 26.18      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 3 years        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year) 2 years 6 months 3 days        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value $ 5,663,083   $ 5,663,083    
Employee Stock Purchase Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Market Price Percentage, Offering Date     85.00%    
Issuance of common stock under employee stock purchase plan (in shares)     11,415 10,104  
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price     $ 26.35 $ 24.72  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant 133,134   133,134    
Share-Based Payment Arrangement, Option [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period 5 years 5 years      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period   3 years      
Share-Based Payment Arrangement, Option [Member] | Minimum [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 3 years        
Share-Based Payment Arrangement, Option [Member] | Maximum [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 5 years        
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Nonemployee [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 1 year        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 610        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Intrinsic Value, Amount Per Share $ 32.74        
Restricted Stock Units (RSUs) [Member] | The 2022 Plan [Member] | Share-Based Payment Arrangement, Employee [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 3 years 26 years 2 months 4 days      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 104,691 121,884      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Intrinsic Value, Amount Per Share $ 30.9        
Performance Stock Units [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 3 years        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 50,747 47,745      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights Over 100 Percent, Percentage 100.00%        
Granted, weighted average grant date fair value (in dollars per share) $ 30.9 $ 26.18     $ 30.9
Performance Stock Units [Member] | Share-Based Payment Arrangement, Tranche One [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 50.00%        
Performance Stock Units [Member] | Share-Based Payment Arrangement, Tranche Two [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights Over 100 Percent, Percentage 100.00%        
Performance Stock Units [Member] | Share-Based Payment Arrangement, Tranche Three [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights Over 100 Percent, Percentage 150.00%        
Selling, General and Administrative Expenses [Member]          
Share-Based Payment Arrangement, Expense $ 1,097,000 $ 1,227,000      
Cost of Sales [Member]          
Share-Based Payment Arrangement, Expense $ 42,000 $ 44,000