Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Deferred tax assets:
Net operating loss carryforwards	$ 38,178	$ 35,947
Tax credit carryforwards	2,497	2,114
Inventory valuation	492	644
Depreciation and amortization	1,101	847
Other accruals not currently deductible for tax purposes	1,591	1,809
Other		85
Total deferred tax assets	43,859	41,446
Valuation allowance	(43,311)	(40,850)
Net deferred tax assets	548	596
Deferred tax liabilities:
Depreciation and amortization		(308)
Purchased intangibles	(198)	(297)
Other	(92)
Net deferred tax liabilities	(290)	(605)
Total net deferred tax assets (liabilities)	258	(9)
Total net deferred tax assets (liabilities)	258	(9)
Other current assets [Member]
Deferred tax liabilities:
Total net deferred tax assets (liabilities)	67	12
Total net deferred tax assets (liabilities)	67	12
Other assets [Member]
Deferred tax liabilities:
Total net deferred tax assets (liabilities)	205	(10)
Total net deferred tax assets (liabilities)	205	(10)
Long-term income taxes payable [Member]
Deferred tax liabilities:
Total net deferred tax assets (liabilities)	(14)	(11)
Total net deferred tax assets (liabilities)	$ (14)	$ (11)