Income Taxes - Additional Information (Detail) - Jun. 30, 2015 - USD ($) $ in Thousands	Total
Tax Credit Carryforward [Line Items]
Accrued deferred taxes, undistributed earnings and profits	$ 672
Unrecognized tax benefits that, if released, would affect income tax expense	2,190
Domestic Tax Authority [Member] | Research and development credit carryforwards
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 959
Domestic Tax Authority [Member] | Research and development credit carryforwards | Minimum
Tax Credit Carryforward [Line Items]
Tax carryforward expiration year	2032
Domestic Tax Authority [Member] | Research and development credit carryforwards | Maximum
Tax Credit Carryforward [Line Items]
Tax carryforward expiration year	2033
State and Local Jurisdiction | Research and development credit carryforwards
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 14,899
State and Local Jurisdiction | Research and development credit carryforwards | Minimum
Tax Credit Carryforward [Line Items]
Tax carryforward expiration year	2016
State and Local Jurisdiction | Research and development credit carryforwards | Maximum
Tax Credit Carryforward [Line Items]
Tax carryforward expiration year	2029
State and Local Jurisdiction | Investment Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 404