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Income Taxes - Schedule of Differences Between Statutory Federal Income Tax Rate and Income Taxes Reported in Consolidated Statements of Operations (Detail)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Federal income tax expense at the statutory rate	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	1.70%	2.00%	1.70%
Research and development credits, net of the federal tax on state credits	(7.10%)	(1.30%)	(2.50%)
Uncertain tax positions, net of federal benefit	3.80%	0.60%	1.20%
Uncertain tax benefits statute expired, net of federal benefit	(0.90%)	(4.40%)	0.00%
Incentive stock option and employee stock purchase plan expense	1.90%	(0.30%)	0.20%
Adjustment to deferred tax liability attributable to acquired intangible assets	0.00%	0.00%	1.60%
Foreign rate differential	(1.20%)	0.00%	1.60%
Change in valuation allowance	7.10%	1.20%	2.60%
California basis step-up election, net of related valuation allowance impact	0.00%	0.00%	(1.20%)
Early adoption of ASU 2016-09	7.20%	(7.50%)	0.00%
Acquisition related transaction costs	1.80%	0.00%	0.00%
Other, net	0.40%	0.50%	0.40%
Effective income tax rate	49.70%	25.80%	40.60%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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