Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012
Tax Credit Carryforward [Line Items]
Accrued deferred taxes, undistributed earnings and profits	1,200
Unrecognized tax benefits that, if released, would affect income tax expense	2,642
State and Local Jurisdiction | Research and development credit carryforwards
Tax Credit Carryforward [Line Items]
Tax credit carry forwards	12,813
State and Local Jurisdiction | Research and development credit carryforwards | Minimum
Tax Credit Carryforward [Line Items]
Tax caryforward expiration year	2018
State and Local Jurisdiction | Research and development credit carryforwards | Maximum
Tax Credit Carryforward [Line Items]
Tax caryforward expiration year	2027
State and Local Jurisdiction | Investment Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carry forwards	124
Tax caryforward expiration year	2015
Foreign Tax Authority
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	399