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Incentive Plans (Detail Textuals) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation cost $ 45,000 $ 258,000 $ 730,000 $ 524,000  
Income tax (deficit) benefit recognized from non-qualified equity compensation $ (2,000) $ 7,000 $ 124,000 $ 20,000  
Treasury stock, Shares used to fund Equity Incentive Plans for restricted stock 10,546,260   10,546,260   10,611,689
Equity Incentive Plans          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options, Exercised 5,000   20,000    
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]          
Award vesting period     5 years    
Maximum term for stock awards     10 years    
Term used to calculate expected volatility     84 months    
Stock options, Exercised 5,000 5,750 20,000 27,250  
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 $ 652,000 $ 76,000 $ 652,000 $ 76,000  
Share-based compensation cost not yet recognized, weighted average period for recognition (less than)     1 year 9 months 18 days 1 year 1 month 6 days  
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 365,000   365,000    
Annual limitation on awards granted to an individual under Equity Incentive Plan     73,000    
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 267,750 267,750 267,750 267,750  
Share-based compensation cost not yet recognized, weighted average period for recognition (less than)     1 year 7 months 6 days 1 year 3 months 18 days  
Forfeiture rate for equity incentive plans     20.00% 20.00%  
Restricted stock, grants in period 0   0    
Restricted stock, Forfeited 0 2,000 0    
Restricted stock, Vesting and distribution 1,500   86,500    
Unrecognized share-based compensation expense, restricted stock $ 159,000,000 $ 867,000,000 $ 159,000,000 $ 867,000,000  
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 185,000   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   185,000