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Incentive Plans (Detail Textuals) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 685 $ 266  
Income tax benefit recognized from non-qualified equity compensation $ 126 $ 27  
Treasury stock, Shares used to fund Equity Incentive Plans for restricted stock 10,547,255   10,611,689
Equity Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options, Exercised 15,000    
Stock options, Granted 0    
Stock options, Forfeitured 0    
Stock Option | 2013 Equity Incentive Plan ("2013 Plan")      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for Equity Incentive Plan 300,000    
Annual limitation on awards granted to an individual under Equity Incentive Plan 60,000    
Stock Option | Equity Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 5 years    
Maximum term for stock awards 10 years    
Term used to calculate expected volatility 84 months    
Stock options, Exercised 21,500 15,000  
Stock options, Granted 0 0  
Stock options, Forfeitured 2,500 0  
Number of shares available for grant 147,500 147,500  
Share-based compensation cost not yet recognized, weighted average period for recognition (less than) 2 years 1 year 3 months 18 days  
Forfeiture rate for equity incentive plans 20.00% 20.00%  
Stock Option | 2010 Equity Incentive Plan ("2010 Plan")      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for Equity Incentive Plan 586,250    
Annual limitation on awards granted to an individual under Equity Incentive Plan 117,250    
Stock Option | the 2006 Equity Incentive Plan ("2006 Plan")      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for Equity Incentive Plan 365,000    
Annual limitation on awards granted to an individual under Equity Incentive Plan 73,000    
Restricted Stock | 2013 Equity Incentive Plan ("2013 Plan")      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for Equity Incentive Plan 300,000    
Annual limitation on awards granted to an individual under Equity Incentive Plan 45,000    
Treasury stock, Shares used to fund Equity Incentive Plans for restricted stock 300,000    
Restricted Stock | Equity Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 5 years    
Number of shares available for grant 267,750 267,750  
Unrecognized share-based compensation expense, stock options $ 88 $ 777  
Share-based compensation cost not yet recognized, weighted average period for recognition (less than) 1 year 9 months 18 days 1 year 6 months  
Forfeiture rate for equity incentive plans 20.00% 20.00%  
Restricted stock, grants in period 0    
Restricted stock, Forfeited 0 2,000  
Restricted stock, Vesting and distribution 85,000    
Unrecognized share-based compensation expense, restricted stock $ 192 $ 1,000  
Restricted Stock | 2010 Equity Incentive Plan ("2010 Plan")      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for Equity Incentive Plan 288,750    
Annual limitation on awards granted to an individual under Equity Incentive Plan 43,312    
Treasury stock, Shares used to fund Equity Incentive Plans for restricted stock 288,750    
Restricted Stock | the 2006 Equity Incentive Plan ("2006 Plan")      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for Equity Incentive Plan 185,000    
Annual limitation on awards granted to an individual under Equity Incentive Plan 27,750    
Treasury stock, Shares used to fund Equity Incentive Plans for restricted stock 185,000