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Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Accounting Policies [Abstract] |  |
Net gain (loss) on foreign currency transactions | $ 0.4 | $ (0.4)
Purchase price included in cash | 2.5 |
Purchase price in contingent consideration | 6.5 |
Assets acquired accrued Contingent Consideration | 1.3 |
Research and development expenses | 3.7 |
Liabilities recorded in acquisition | $ 1.5 |
Period for amount payable upon meeting milestones | December 2021 through December 2023 |
Long-term deferred tax asset | $ 0.3 |

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