v3.26.1
Note 3 - Equity Compensation Plans and Capital Stock (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Share Repurchase Program, Authorized, Number of Shares (in shares) 1,045,774  
Treasury Stock, Shares, Acquired (in shares) 0 0
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings (in shares) 630 9,801
Cumulative Preferred Stock [Member]    
Preferred Stock, Shares Authorized (in shares) 1,000,000  
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 1  
Preferred Stock, Shares Issued (in shares) 0 0
Time Restricted Shares [Member] | Vesting Over Three Years [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 53,221  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 3 years  
Time Restricted Shares [Member] | Vesting Over Two Years [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 50,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 2 years  
Time Restricted Shares [Member] | Cliff Vesting Over One Year [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 2,742  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 1 year  
Performance Restricted Shares [Member] | Vesting Over Three Years [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 36,313  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 3 years  
Restricted Stock [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 142,276 4,026
Share-Based Payment Arrangement, Expense $ 0.7 $ 0.2
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 1.6 $ 0.1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 1 year 9 months 18 days 9 months 18 days
The 2025 Plan [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 550,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 521,696