Components of Net Deferred Tax Assets (Liabilities) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Deferred tax assets:
Inventory valuation and receivable allowances	$ 4,788	$ 4,189
Accrued compensation	1,367	1,424
Equity compensation	6,036	5,565
Federal and state research and development tax credit carryforwards	8,569	8,716
Net operating loss		900
Other accruals	919	328
Repatriation of foreign earnings		76
Other temporary differences	1,333	594
Deferred tax Asset	25,128	24,348
Valuation allowance	(8,682)	(7,973)
Total deferred tax assets	16,446	16,375
Deferred tax liabilities:
Deferred revenue	(3,488)	(4,776)
Property and equipment depreciation	(3,995)	(2,452)
Acquired intangible assets	(8,507)	(5,346)
Total deferred tax liabilities	(15,990)	(12,574)
Net deferred tax (liabilities) assets	456	3,801
Other Amortizable Assets
Deferred tax assets:
Gain on sale-leaseback	$ 2,116	$ 2,556