Note 7 - Income Taxes (Tables)

12 Months Ended

Jun. 30, 2015

Notes Tables

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

	Year Ended June 30,
	2015		2014		2013
	(In thousands)
Current:
Federal	$	—	$	—	$	—
State		—		—		—
	$	—	$	—	$	—
Deferred:
Federal		—		—		—
State		—		—		—
		—		—		—
	$	—	$	—	$	—

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

	Year Ended June 30,
	2015			2014			2013
Statutory federal income tax benefit		(34.0	)%		(34.0	)%		(34.0	)%
State income taxes, net of federal income tax benefit		(4.3	)		(28.8	)		(3.7	)
Foreign income taxes, net of federal income tax benefit		1.8			—			—
Engineering credits		(8.2	)		(1.5	)		(1.1	)
Valuation allowance		43.3			65.2			39.2
Other		1.7			(0.9	)		(0.4	)
		0.3	%		0.0	%		0.0	%

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

	June 30,
	2015			2014			2013
	(In thousands)
Deferred tax assets:
Net operating loss carry forwards	$	11,207		$	10,502		$	8,888
Capital loss and other credit carry forwards		62			151			57
Engineering credit carry forwards		1,804			1,611			1,412
Allowance for bad debts and returns		10			40			105
Inventory reserves		1,106			1,280			408
Capitalized inventory costs		41			7			—
Stock Compensation		247			—			—
Other accruals		152			513			849
Total gross deferred tax assets		14,629			14,104			11,719
Less valuation allowance on deferred tax assets		(14,550	)		(14,090	)		(11,717	)
Net deferred tax assets		79			14			2
Deferred tax liabilities:
Marketable securities		—			(1	)		(1	)
Depreciation and other		(79	)		(13	)		(1	)
Total deferred tax liabilities		(79	)		(14	)		(2	)
Net deferred taxes	$	—		$	—		$	—

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

	June 30,
	2015		2014			2013
Balance at July 1	$	17	$	17		$	26
Increases related to tax positions taken in prior year		—		3			3
Decreases due to lapse of statute of limitations		—		(2	)		(11	)
Related interest and penalties, net of federal tax benefit		—		(1	)		(1	)
Balance at June 30	$	17	$	17		$	17