Note 7 - Income Taxes (Detail) - Deferred income tax assets (liabilities): (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Net operating loss carry forwards	$ 5,059	$ 4,119	$ 3,861
Capital loss and other credit carry forwards	178	21	20
Research and development credit carry forwards	1,244	1,148	994
Allowance for bad debts and returns	19	78	53
Inventory reserves	650	168	224
Capitalized inventory costs	17	16	24
Marketable securities			(24)
Other accruals	500	514	507
Total gross deferred tax assets	7,667	6,064	5,659
Less valuation allowance on deferred tax assets	(7,654)	(6,034)	(5,620)
Net deferred tax assets	13	30	39
Deferred tax liabilities:
Marketable securities	(3)	(15)
Depreciation and other	(10)	(15)	(39)
Total deferred tax liabilities	$ (13)	$ (30)	$ (39)