Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jun. 30, 2014

Accounting Policies [Abstract]

Summary of Valuation Allowance [Table Text Block]

Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts		Deductions (1)			Balance at End of Period
Year Ended June 30, 2014	$	68	$	49	$	—	$	(25	)	$	92
Year Ended June 30, 2013	$	38	$	31	$	—	$	(1	)	$	68
Year Ended June 30, 2012	$	180	$	35	$	—	$	(177	)	$	38

Schedule of Product Warranty Liability [Table Text Block]

	June 30,
	2014			2013
Beginning balance	$	190		$	205
Cost of warranty claims		(45	)		(77	)
Accruals for product warranties		14			62
Ending balance	$	159		$	190

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	June 30, 2014
	Adjusted Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash & Cash Equivalents		Short-term Marketable Securities		Long-term Marketable Securities
Level 1:
Cash		617		-		-		617		617
Money Market Funds		4,845		-		-		4,845		4,845
Subtotal	$	5,462	$	-	$	-	$	5,462	$	5,462	$		$	-
Level 2:
U.S. Agency Securities		332		-		-		332		-		332		-
Corporate securities		1,354		1		-		1,355		-		1,355		-
Municipal securities		76		-		-		76		-		76		-
Subtotal	$	1,762	$	1	$	-	$	1,763		-	$	1,763	$	-
Total	$	7,224	$	1	$	-	$	7,225	$	5,462	$	1,763	$	-

	June 30, 2013
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash & Cash Equivalents		Short-term Marketable Securities		Long-term Marketable Securities
Level 1:
Cash		1,257		-		-			1,257		1,257
Money Market Funds		709		-		-			709		709
U.S. Treasury Securities		503		-		-			503		-		503		-
Subtotal	$	2,469	$	-	$	-		$	2,469	$	1,966	$	503	$	-
Level 2:
U.S. Agency Securities		544		-		(1	)		543		-		-		543
Corporate securities		4,915		1		(11	)		4,905		-		2,745		2,160
Municipal securities		5,728		15		-			5,743		-		2,900		2,843
Asset backed securities		127		-		-			127		-		127		-
Mortgage backed securities		30		-		-			30		-		30		-
Subtotal	$	11,344	$	16	$	(12	)	$	11,348		-	$	5,802	$	5,546
Total	$	13,813	$	16	$	(12	)	$	13,817	$	1,966	$	6,305	$	5,546

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year Ended June 30,
	2014			2013			2012
	(In thousands)
Loss:
Net loss	$	(5,624	)	$	(10,363	)	$	(4,107	)
Shares:
Weighted average shares for basic and diluted loss per share		12,253			12,253			12,253
Loss per share		(0.46	)		(0.85	)		(0.34	)