Note 7 - Income Taxes (Tables)

12 Months Ended

Jun. 30, 2014

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended June 30,
	2014		2013		2012
	(In thousands)
Current:
Federal	$	—	$	—	$	—
State		—		—		16
	$	—	$	—	$	16
Deferred:
Federal		—		—		—
State		—		—		—
		—		—		—
	$	—	$	—	$	16

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended June 30,
	2014			2013			2012
Statutory federal income tax benefit		(34.0	)%		(34.0	)%		(34.0	)%
State income taxes, net of federal income tax benefit		(28.8	)		(3.7	)		(3.6	)
Engineering credits		(1.5	)		(1.1	)		(1.8	)
Valuation allowance		65.2			39.2			39.3
Other		(0.9	)		(0.4	)		0.5
		0.0	%		0.0	%		0.4	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	June 30,
	2014			2013			2012
	(In thousands)
Deferred tax assets:
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		—			—			—
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
Deferred tax liabilities:
Marketable securities		(1	)		(1	)		(3	)
Depreciation and other		(13	)		(1	)		(10	)
Total deferred tax liabilities		(14	)		(2	)		(13	)
Net deferred taxes	$	—		$	—		$	—

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	June 30,
	2014			2013			2012
Balance at July 1	$	17		$	26		$	21
Increases related to tax positions taken in prior year		3			3			4
Decreases due to lapse of statute of limitations		(2	)		(11	)		(1	)
Related interest and penalties, net of federal tax benefit		(1	)		(1	)		2
Balance at June 30	$	17		$	17		$	26