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Stock-Based Compensation (Narrative) (Details) - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 07, 2018 | Aug. 23, 2017 | Aug. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of stock options awarded |  |  |  |  |  |  | 561,000 | 600,000 |
Stock-based compensation charge, net |  |  |  | $ 436,000 | $ 598,000 |  | $ 823,000 | $ 1,185,000 |
Deferred tax asset related to stock-based compensation |  |  |  | 300,000 |  |  | 300,000 |  | $ 200,000
Valuation allowance |  |  |  | $ 300,000 |  |  | $ 300,000 |  | $ 200,000
Stock Options [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Exercisable stock options |  |  |  | 0 | 0 |  | 170,335 | 0 |
Options exercise price range, lower limit |  |  |  |  |  |  | $ 3.07 |  |
Options exercise price range, upper limit |  |  |  |  |  |  | $ 11.23 |  |
Expected volatility |  |  |  |  |  |  | 57.00% | 44.00% |
Expected life (in years) |  |  |  |  |  |  | 3 years | 3 years |
Risk-free rate |  |  |  |  |  |  | 1.57% | 2.75% |
Unrecognized compensation cost |  |  |  | $ 1,300,000 |  |  | $ 1,300,000 |  |
Unrecognized compensation cost, expected recognition period, years |  |  |  |  |  |  | 3 years |  |
Stock Options [Member] | August 2008 [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Expected volatility calculation term |  |  |  |  |  |  | 750 days |  |
Stock Options [Member] | Executive Officers [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares forfeited |  |  |  |  | 0 |  | 0 |  |
Stock Options [Member] | Executive Officers [Member] | August 2008 [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares forfeited |  |  |  |  |  |  |  | 200,000 |
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] | Employees [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of stock options awarded |  |  |  | 561,000 | 0 |  | 561,000 |  |
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 |
Stock-based compensation charge, net |  |  |  | $ 0 | $ 600,000 |  | $ 0 | $ 1,000,000 |
Unrecognized compensation cost |  |  |  | $ 1,100,000 |  |  | $ 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] |  |  |  |  |  |  |  |  |
Performance target, per share |  | $ 23 |  |  |  |  |  |  |
Percentage of increase target price |  | 35.00% |  |  |  |  |  |  |
Closing price, per share |  | $ 9.38 |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |
Percentage of increase target price | 55.00% |  |  |  |  |  |  |  |
Closing price, per share | $ 6.2 |  |  |  |  |  |  |  |
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 |  |  |  | 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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |

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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 + Details
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