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Stock-Based Compensation (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jan. 29, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Proceeds from Stock Options Exercised $ 952 $ 2,616  
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation 112,827 97,171  
Tax withholding for share-based compensation $ 2,800 $ 3,900  
Total intrinsic value of all options exercised 2,600 4,100  
Proceeds from employee stock purchase plan transactions 2,061 1,689  
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Proceeds from Stock Options Exercised 1,300 $ 2,600  
Total unrecognized compensation cost nonvested awards $ 3,500    
Weighted average period, unrecognized compensation cost, nonvested awards 1 year 4 months 24 days    
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost nonvested restricted stock units $ 20,000    
Weighted average period, unrecognized compensation cost, nonvested awards 1 year 10 months 24 days    
Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost nonvested restricted stock units $ 500    
Weighted average period, unrecognized compensation cost, nonvested awards 1 month 6 days    
The Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized     3,425,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Continuous Days of Service 90 days    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Hours Per Week Employed 20 hours    
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent 85.00%    
Common shares issued to employees 74,760 58,081  
Shares available for future issuance 395,467    
Proceeds from employee stock purchase plan transactions $ 1,700    
The 2021 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for future grants 1,920,325