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Incentive Plans (Detail Textuals) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation cost $ 37,000 $ 292,000 $ 767,000 $ 816,000  
Income tax (deficit) benefit recognized from non-qualified equity compensation $ (10,000) $ 186,000 $ 114,000 $ 206,000  
Treasury stock, Shares used to fund Equity Incentive Plans for restricted stock 10,567,008   10,567,008   10,611,689
Equity Incentive Plans          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options, Exercised 11,250   31,250    
Stock options, Granted 0   0    
Stock options, Forfeitured 0   0    
Stock Option | Equity Incentive Plans          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum term for stock awards     10 years    
Term used to calculate expected volatility     84 months    
Stock options, Exercised 11,250 56,500 31,250 83,750  
Stock options, Granted 0 0 0 0  
Stock options, Forfeitured 0 0 0 2,500  
Number of shares available for grant 147,500 147,500 147,500 147,500  
Unrecognized share-based compensation expense, stock options $ 68,000 $ 503,000 $ 68,000 $ 503,000  
Share-based compensation cost not yet recognized, weighted average period for recognition (less than)     1 year 6 months 1 year  
Forfeiture rate for equity incentive plans     20.00% 20.00%  
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   300,000    
Annual limitation on awards granted to an individual under Equity Incentive Plan     60,000    
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   586,250    
Annual limitation on awards granted to an individual under Equity Incentive Plan     117,250    
Stock Option | 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   185,000    
Annual limitation on awards granted to an individual under Equity Incentive Plan     27,750    
Restricted Stock | Equity Incentive Plans          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant 267,750 267,750 267,750 267,750  
Share-based compensation cost not yet recognized, weighted average period for recognition (less than)     1 year 6 months 1 year 2 months 12 days  
Forfeiture rate for equity incentive plans     20.00% 20.00%  
Restricted stock, grants in period 0 0 0 0  
Restricted stock, Forfeited 0 0 0 2,000  
Restricted stock, Vesting and distribution 3,000 10,500 89,500 10,500  
Unrecognized share-based compensation expense, restricted stock $ 131,000 $ 687,000 $ 131,000 $ 687,000  
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   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   300,000    
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   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   288,750    
Restricted Stock | 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   365,000    
Annual limitation on awards granted to an individual under Equity Incentive Plan     73,000    
Treasury stock, Shares used to fund Equity Incentive Plans for restricted stock 185,000   185,000