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Stock Compensation Plans (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jan. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate intrinsic value of options exercised during the period $ 284 $ 142  
Number of unvested stock options (shares) 161,750 174,850  
Unvested stock options, aggregate grant date fair value $ 610 $ 527  
Unvested stock options, aggregate intrinsic value $ 867    
Stock options vested during period (shares) 0 18,200  
Stock options vested during period, aggregate grant date fair value   $ 164  
Stock options, outstanding, aggregate intrinsic value $ 4,140 $ 3,130  
Unrecognized compensation expense, non-vested options $ 559    
Unrecognized compensation expense, non-vested options, amortization period (in years) 2 years 3 months 29 days    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized 300,000    
Award vesting percentage 20.00%    
Award vesting period (years) 5 years    
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Contractual term 10 years    
Number of unvested shares 0 0  
Equity Incentive Plan 2014      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized     352,366
Number of shares available for grant 29,526    
MRDP | Stock Grant Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock grants awarded (shares) 0 0