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Stock-Based Compensation (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Feb. 01, 2016
Jan. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares Paid for Tax Withholding for Share Based Compensation 47,172      
Tax withholding for share-based compensation $ 500      
Proceeds from stock option plan transactions 6,732 $ 6,332    
Excess tax benefits from stock-based compensation 202 0    
Employee contributions 688 708    
Total intrinsic value of all options exercised $ 1,800 800    
Forfeiture rate 10.00%      
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total unrecognized compensation cost nonvested awards $ 3,100      
Weighted average period, unrecognized compensation cost, nonvested awards 3 years 1 month 6 days      
Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total unrecognized compensation cost nonvested restricted stock units $ 3,200      
Weighted average period, unrecognized compensation cost, nonvested awards 1 year 6 months      
The 2016 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 1,352,631      
The 2016 Plan | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 4 years      
Expiration period 7 years      
The 2014 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized       2,250,000
The 2014 Plan | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 4 years      
Expiration period 8 years      
The Purchase Plan | The Purchase Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of continuous days of service 90 days      
Number of hours per week employed 20 hours      
Percent of market value 85.00%      
Offering period 3 months      
Employee contributions $ 688 $ 708    
Common shares issued to employees 80,468 97,383    
Shares available for future issuance 537,063      
Director | The 2016 Plan | Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 1 year      
Director | The 2014 Plan | Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 1 year      
Executives and Employees | The 2016 Plan | Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 4 years      
Executives and Employees | The 2014 Plan | Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 4 years