Quarterly report [Sections 13 or 15(d)]

Note 7 - Stock-Based Compensation - Performance Stock Performance (Details)

v3.25.2
Note 7 - Stock-Based Compensation - Performance Stock Performance (Details) - $ / shares
9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Forfeited or expired, weighted-average exercise price (in dollars per share) $ 47.64  
Weighted-average exercise price, outstanding (in dollars per share) $ 34.24  
Performance Stock Units [Member]    
Unvested shares, number of shares (in shares) 47,745  
Unvested shares, weighted average grant date fair value (in dollars per share) $ 26.18  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 50,747 47,745
Granted, weighted average grant date fair value (in dollars per share) $ 30.9 $ 26.18
Vested, number of shares (in shares) 0  
Vested, weighted average grant date fair value (in dollars per share) $ 0  
Forfeited, number of shares (in shares) (47,745)  
Forfeited or expired, weighted-average exercise price (in dollars per share) $ 26.18  
Unvested, number of shares (in shares) 50,747  
Weighted-average exercise price, outstanding (in dollars per share) $ 30.9