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Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Feb. 04, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation 88,723 83,988  
Tax withholding for share-based compensation $ 1,600 $ 1,000  
Employee contributions 286 289  
Total intrinsic value of all options exercised 3,000 300  
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost nonvested awards $ 7,500    
Weighted average period, unrecognized compensation cost, nonvested awards 3 years 2 months 12 days    
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost nonvested restricted stock units $ 10,500    
Weighted average period, unrecognized compensation cost, nonvested awards 1 year 9 months 18 days    
The Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee contributions $ 286 $ 289  
Common shares issued to employees 24,738 33,706  
Shares available for future issuance 179,802    
The 2019 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized     1,500,000
Number of shares available for future grants 628,921    
The 2019 Plan | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Expiration period 7 years    
Director | The 2019 Plan | Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Executives and Employees | The 2019 Plan | Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years