Schedule of Gross Operating Loss Carryforwards and Tax Credit Carryforwards (Detail) $ in Thousands	12 Months Ended
	Jun. 30, 2017 USD ($)
Federal research and development credits
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 10,953
Federal research and development credits | Minimum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2019-06
Federal research and development credits | Maximum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2037-06
Foreign
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 4,539
Loss carryforwards	$ 2,610
Foreign | Minimum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2024-06
Loss carryforwards, expiration date	2018-06
Foreign | Maximum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2027-06
Loss carryforwards, expiration date	2024-06
State
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 4,820
Loss carryforwards	$ 71,536
State | Minimum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2018-06
Loss carryforwards, expiration date	2018-06
State | Maximum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2037-06
Loss carryforwards, expiration date	2037-06
Federal
Operating Loss Carryforwards [Line Items]
Loss carryforwards	$ 100,922
Federal | Minimum
Operating Loss Carryforwards [Line Items]
Loss carryforwards, expiration date	2020-06
Federal | Maximum
Operating Loss Carryforwards [Line Items]
Loss carryforwards, expiration date	2037-06