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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
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Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014
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 | 2.00% | 1.70% | 1.60%
Research and development credits, net of the federal tax on state credits | (1.30%) | (2.50%) | (0.20%)
Uncertain tax positions, net of federal benefit | 0.60% | 1.20% | (0.10%)
Uncertain tax benefits statute expired, net of federal benefit | (4.40%) | 0.00% | 0.00%
Incentive stock option and employee stock purchase plan expense | (0.30%) | 0.20% | (0.30%)
Adjustment to deferred tax liability attributable to acquired intangible assets | 0.00% | 1.60% | 0.00%
Foreign rate differential | 0.00% | 1.60% | 0.80%
Change in valuation allowance | 1.20% | 2.60% | 1.20%
Basis difference, disposition of foreign subsidiary | 0.00% | 0.00% | (1.90%)
California basis step-up election, net of related valuation allowance impact | 0.00% | (1.20%) | 0.00%
Early adoption of ASU 2016-09 | (7.50%) | 0.00% | 0.00%
Other, net | 0.50% | 0.40% | 0.50%
Effective income tax rate | 25.80% | 40.60% | 36.60%

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 + Details
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