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Income Taxes (Detail Textual) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2018
Income Tax Disclosure [Abstract] |  |  |  |  |
Liability for unrecognized tax benefits | $ 4.4 |  | $ 4.4 |  | $ 4.1
Unrecognized tax benefit that would impact the company's effective tax rate | $ 4.4 |  | $ 4.4 |  |
Effective tax rate, percentage | 26.10% | (84.70%) | 19.70% | (38.60%) |
Statutory U.S. Income Tax Rate |  |  | 21.00% | 35.00% |
TCJA one-time transition tax, measurement period adjustment to income tax expense |  |  | $ 2.2 |  |
TCJA reameasurement of deferred taxes, measurement period adjustment to income tax expense | $ 0.5 |  | $ 0.5 |  |

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