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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, 2016 | Jun. 30, 2015 | Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Proceeds from maturities and sales of marketable investment securities | $ 115.1 | $ 165.6 | $ 382.5
Effect of foreign exchange rates on cash and cash equivalents | (2.2) | (4.8) | (0.6)
Other receivables | 3.3 | 1.9 |
Trade accounts receivables | $ 91.7 | $ 85.8 |
Equipment | Minimum |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 5 years |  |
Equipment | Maximum |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 7 years |  |
Leasehold Improvements | Minimum |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 3 years |  |
Leasehold Improvements | Maximum |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Estimated useful lives, in years | 15 years |  |
Restatement Adjustment |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |
Proceeds from maturities and sales of marketable investment securities |  |  | (0.6)
Effect of foreign exchange rates on cash and cash equivalents |  |  | 0.6
Other receivables |  |  | (0.6)
Trade accounts receivables |  |  | $ 0.6

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