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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Other income (expense) | $ (2.5) | $ 1.5 | $ 0.5
Interest expense | (6.0) | (0.3) | (0.2)
Other long-term liabilities | 7.2 | 7.8 |
Contingent consideration | $ 13.2 | 10.4 |
Equipment [Member] | Minimum [Member] |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 5 years |  |
Equipment [Member] | Maximum [Member] |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 7 years |  |
Leasehold Improvements [Member] | Minimum [Member] |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 3 years |  |
Leasehold Improvements [Member] | Maximum [Member] |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 10 years |  |
Restatement Adjustment [Member] |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Other income (expense) |  | 0.3 | 0.2
Interest expense |  | (0.3) | $ (0.2)
Other long-term liabilities |  | (10.4) |
Contingent consideration |  | $ 10.4 |

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