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Stock-Based Compensation (Narrative) (Details) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Oct. 14, 2019 | Sep. 07, 2018 | Aug. 23, 2017 | Sep. 30, 2018 | Aug. 31, 2017 | Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options awarded |  |  |  |  |  |  | 600,000 |
Deferred tax asset related to stock-based compensation |  |  |  |  |  | $ 300,000 |  | $ 200,000
Executive Officers [Member] | 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 |  |  |  |  |
Employees [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options awarded | 561,000 |  |  |  |  |  |  |
Strike price | $ 3.07 |  |  |  |  |  |  |
Stock Options [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options awarded |  |  |  |  |  | 0 |  |
Expected volatility calculation term |  |  |  |  |  | 750 days |  |
Exercisable stock options |  |  |  |  |  | 170,335 | 0 |
Options exercise price range, lower limit |  |  |  |  |  | $ 6.20 |  |
Options exercise price range, upper limit |  |  |  |  |  | $ 11.23 |  |
Expected volatility |  |  |  |  |  |  | 44.00% |
Expected life (in years) |  |  |  |  |  |  | 3 years |
Risk-free rate |  |  |  |  |  |  | 2.75% |
Unrecognized compensation cost |  |  |  |  |  | $ 700,000 |  |
Unrecognized compensation cost, expected recognition period, years |  |  |  |  |  | 2 years |  |
Stock Options [Member] | Executive Officers [Member] | August 2008 [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 |  |  |  |  |  |  | 600,000 |
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 forfeited |  |  |  |  |  | 0 |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options awarded |  |  |  |  |  |  | 148,000 |
Vested number of shares of restricted stock |  |  |  |  |  |  | 52,594 |
Unrecognized compensation cost |  |  |  |  |  | $ 1,100,000 |  |
Unrecognized compensation cost, expected recognition period, years |  |  |  |  |  | 2 years |  |
Restricted Stock [Member] | September 2018 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Expected volatility calculation term |  |  |  | 30 days |  |  |  |
Expected volatility |  |  |  | 37.40% |  |  |  |
Expected life (in years) |  |  |  | 3 years |  |  |  |
Future dividends |  |  |  | $ 0 |  |  |  |
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] |  |  |  |  |  |  |  |
Strike price |  |  |  |  |  | $ 0 |  |
Expected volatility calculation term |  |  |  |  |  | 30 days |  |
Expected volatility |  |  |  |  |  | 44.00% |  |
Expected life (in years) |  |  |  |  |  | 3 years |  |
Future dividends |  |  |  |  |  | $ 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] |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  |  |  | 100.00% |
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] |  |  |  |  |  |  |  |
Share based compensation number of stock awarded |  |  |  |  | 210,000 |  |  |
Restricted Stock [Member] | Non-Employee Directors [Member] | September 2018 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vested number of shares of restricted stock |  |  |  |  |  |  | 52,594 |
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] | 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 |  |
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 |  |

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