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Stock-Based Compensation (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 07, 2018
Mar. 01, 2018
Aug. 23, 2017
Sep. 30, 2018
May 31, 2017
Aug. 31, 2016
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]                      
Number of stock options awarded                 600,000    
Stock-based compensation charge (reversal), net             $ 487,000 $ 575,000 [1] $ 1,672,000 $ 2,010,000 [1]  
Number of shares, forfeitures                 278,386 37,333  
Deferred tax asset related to stock-based compensation             800,000   $ 800,000   $ 700,000
Valuation allowances             $ 800,000   $ 800,000   $ 700,000
August 2017 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share                 $ 23.00    
Percentage of increase target price                 35.00%    
Closing price, per share     $ 9.38                
Stock Options [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Exercisable stock options             0 0 0 105,982  
Unrecognized compensation cost             $ 1,000,000   $ 1,000,000    
Unrecognized compensation cost, expected recognition period, years                 3 years    
Expected volatility                 44.00%    
Expected life (in years)                 3 years    
Risk-free rate                 2.75%    
Expected volatility calculation term                 750 days    
Options exercise price range, lower limit                 $ 6.20    
Options exercise price range, upper limit                 13.16    
Stock Options [Member] | Executive Officers [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Strike price                 $ 24.46    
Stock Options [Member] | Executive Officers And Employees [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded             0 0 600,000 0  
Number of shares, forfeitures                 278,386    
Stock Options [Member] | Executive Officers And Employees [Member] | August 2008 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded                 200,000    
Stock Options [Member] | Employees [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of shares, forfeitures                   37,333  
Number of shares forfeited             78,386 0      
Restricted Stock [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded                   611,411  
Fair value of restricted stock vested                 $ 500,000 $ 500,000  
Unrecognized compensation cost             $ 2,000,000   $ 2,000,000    
Unrecognized compensation cost, expected recognition period, years                 2 years    
Forfeitures, Number of Shares of Restricted Stock                 (18,000) (125,961)  
Vested number of shares of restricted stock                 64,003    
Restricted Stock [Member] | September 2018 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Expected volatility       37.40%              
Expected life (in years)       3 years              
Future dividends       $ 0              
Expected volatility calculation term       30 days              
Restricted Stock [Member] | September 2018 [Member] | Below $15 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting percentage       0.00%              
Restricted Stock [Member] | September 2018 [Member] | At or above $15 and below $19 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting percentage       33.00%              
Restricted Stock [Member] | September 2018 [Member] | At or above $19 and below $23 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting percentage       66.00%              
Restricted Stock [Member] | September 2018 [Member] | At or above $23 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting percentage       100.00%              
Restricted Stock [Member] | August 2017 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Expected volatility                 44.00%    
Expected life (in years)                 3 years    
Future dividends                 $ 0    
Expected volatility calculation term                 30 days    
Strike price                 $ 0    
Restricted Stock [Member] | August 2017 [Member] | Below $15 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting percentage                 0.00%    
Restricted Stock [Member] | August 2017 [Member] | At or above $15 and below $19 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting percentage                 33.00%    
Restricted Stock [Member] | August 2017 [Member] | At or above $19 and below $23 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting percentage                 66.00%    
Restricted Stock [Member] | August 2017 [Member] | At or above $23 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share                 $ 23.00    
Vesting percentage                   100.00%  
Restricted Stock [Member] | August 2016 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded         150,000            
Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded                 148,000    
Performance target, per share $ 23.00                    
Percentage of increase target price 55.00%                    
Closing price, per share $ 6.20                    
Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded                 210,000    
Restricted Stock [Member] | Executive Officers [Member] | August 2016 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded           350,000          
Restricted Stock [Member] | Non-Employee Directors [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vested number of shares of restricted stock                   56,250  
Restricted Stock [Member] | Non-Employee Directors [Member] | August 2017 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded                 52,594    
Restricted Stock [Member] | Executive Officers And Employees [Member] | August 2017 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded                 326,000    
Restricted Stock [Member] | Former Chief Executive Officer [Member] | August 2016 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded         200,000            
Restricted Stock [Member] | Chief Financial Officer [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded   22,817                  
Restricted Stock [Member] | Chief Financial Officer [Member] | Vested on March 1, 2019 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of stock options awarded   11,409                  
Restricted Stock [Member] | One-Third Shares Vest 2019 Fundamental EPS [Member] | August 2016 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Fundamental EPS, to be achieved                 $ 2.60    
Restricted Stock [Member] | Two-Thirds Shares Vest 2019 Fundamental EPS [Member] | August 2016 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Fundamental EPS, to be achieved                 2.80    
Restricted Stock [Member] | All Shares Vest 2019 Fundamental EPS [Member] | August 2016 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Fundamental EPS, to be achieved                 $ 3.00    
Restricted Stock [Member] | Full Time Basis [Member] | Executive Officers And Employees [Member] | August 2017 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting date                 Aug. 23, 2020    
Restricted Stock [Member] | Recipient Is A Director [Member] | Non-Employee Directors [Member] | August 2017 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting date                 Aug. 23, 2018    
Restricted Stock [Member] | Restricted Stock with Time-Based Vesting Conditions [Member] | Employees [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of shares forfeited             18,000   18,000    
Restricted Stock [Member] | Market or Performance Conditions upon Termination [Member] | Employees [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of shares forfeited                   30,635  
2019 Fundamental EPS [Member] | August 2016 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Fundamental EPS, linear interpolation                 $ 2.80    
Minimum [Member] | Restricted Stock [Member] | September 2018 [Member] | At or above $15 and below $19 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share       $ 15.00              
Minimum [Member] | Restricted Stock [Member] | September 2018 [Member] | At or above $19 and below $23 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share       19.00              
Minimum [Member] | Restricted Stock [Member] | September 2018 [Member] | At or above $23 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share       23.00              
Minimum [Member] | Restricted Stock [Member] | August 2017 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Risk-free rate                 1.275%    
Minimum [Member] | Restricted Stock [Member] | August 2017 [Member] | At or above $15 and below $19 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share                 $ 15.00    
Minimum [Member] | Restricted Stock [Member] | August 2017 [Member] | At or above $19 and below $23 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share                 19.00    
Minimum [Member] | 2019 Fundamental EPS [Member] | August 2016 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Fundamental EPS                 $ 2.60    
Maximum [Member] | Restricted Stock [Member] | September 2018 [Member] | Below $15 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share       15.00              
Maximum [Member] | Restricted Stock [Member] | September 2018 [Member] | At or above $15 and below $19 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share       19.00              
Maximum [Member] | Restricted Stock [Member] | September 2018 [Member] | At or above $19 and below $23 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share       $ 23.00              
Maximum [Member] | Restricted Stock [Member] | August 2017 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Risk-free rate                 1.657%    
Maximum [Member] | Restricted Stock [Member] | August 2017 [Member] | Below $15 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share                 $ 15.00    
Maximum [Member] | Restricted Stock [Member] | August 2017 [Member] | At or above $15 and below $19 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share                 19.00    
Maximum [Member] | Restricted Stock [Member] | August 2017 [Member] | At or above $19 and below $23 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance target, per share                 23.00    
Maximum [Member] | 2019 Fundamental EPS [Member] | August 2016 [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Fundamental EPS                 $ 3.00    
[1] Refer to Note 1.