Note 7 - Income Taxes (Details) - Deferred Income Tax Assets (Liabilities) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Deferred Income Tax Assets (Liabilities) [Abstract]
Net operating loss carry forwards	$ 10,502	$ 8,888	$ 5,059
Capital loss and other credit carry forwards	151	57	178
Engineering credit carry forwards	1,611	1,412	1,244
Allowance for bad debts and returns	40	105	19
Inventory reserves	1,280	408	650
Capitalized inventory costs	7		17
Marketable securities	0	0	0
Other accruals	513	849	500
Total gross deferred tax assets	14,104	11,719	7,667
Less valuation allowance on deferred tax assets	(14,090)	(11,717)	(7,654)
Net deferred tax assets	14	2	13
Marketable securities	(1)	(1)	(3)
Depreciation and other	(13)	(1)	(10)
Total deferred tax liabilities	(14)	(2)	(13)
Net deferred taxes	$ 0	$ 0	$ 0