Note 14 - Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Mar. 31, 2015

Consolidated Statements of Operations for Quarterly Information [Member]

Notes Tables

Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]

	Quarter Ended June 30, 2014								Quarter Ended June 30, 2013
	As Reported			Adjustment		As Adjusted			As Reported		Adjustment			As Adjusted
	(In Thousands)								(In Thousands)
Sales	$	7,442		$	182	$	7,624		$	6,909	$	(504	)	$	6,405
Cost of sales		4,474			91		4,565			4,057		(230	)		3,827
Gross profit		2,968			91		3,059			2,852		(274	)		2,578
Income (loss) from operations		(1,139	)		91		(1,048	)		172		(274	)		(102	)
Net income (loss)		(413	)		32		(381	)		30		(135	)		(105	)
Net income (loss) per share	$	(0.08	)	$	0.01	$	(0.07	)	$	0.01	$	(0.03	)	$	(0.02	)

	Quarter Ended September 30, 2014							Quarter Ended September 30, 2013
	As Reported		Adjustment			As Adjusted		As Reported		Adjustment			As Adjusted
	(In Thousands)							(In Thousands)
Sales	$	8,684	$	(738	)	$	7,946	$	7,299	$	54		$	7,353
Cost of sales		4,408		(397	)		4,011		4,306		58			4,364
Gross profit		4,276		(341	)		3,935		2,993		(4	)		2,989
Income (loss) from operations		536		(341	)		195		360		(4	)		356
Net income (loss)		188		(124	)		64		106		(1	)		105
Net income (loss) per share - diluted	$	0.03	$	(0.02	)	$	0.01	$	0.02	$	(0.00	)	$	0.02

	Quarter Ended December 31, 2014						Quarter Ended December 31, 2013
	As Reported		Adjustment		As Adjusted		As Reported		Adjustment			As Adjusted
	(In Thousands)						(In Thousands)
Sales	$	8,842	$	849	$	9,691	$	7,438	$	(37	)	$	7,401
Cost of sales		4,489		404		4,893		4,293		(48	)		4,245
Gross profit		4,353		445		4,798		3,145		11			3,156
Income (loss) from operations		783		445		1,228		322		10			332
Net income (loss)		304		159		463		36		64			100
Net income (loss) per share - diluted	$	0.05	$	0.03	$	0.08	$	0.01	$	0.01		$	0.02

	Six Months Ended September 30, 2014									Six Months Ended September 30, 2013
	As Reported			Adjustment			As Adjusted			As Reported		Adjustment			As Adjusted
	(In Thousands)									(In Thousands)
Sales	$	16,126		$	(556	)	$	15,570		$	14,208	$	(450	)	$	13,758
Cost of sales		8,882			(306	)		8,576			8,363		(172	)		8,191
Gross profit		7,244			(250	)		6,994			5,846		(278	)		5,568
Income (loss) from operations		(603	)		(250	)		(853	)		533		(278	)		255
Net income (loss)		(225	)		(92	)		(317	)		136		(136	)		0
Net income (loss) per share	$	(0.04	)	$	(0.02	)	$	(0.06	)	$	0.02	$	(0.02	)	$	(0.00	)

	Nine Months Ended December 31, 2014						Nine Months Ended December 31, 2013
	As Reported		Adjustment		As Adjusted		As Reported		Adjustment			As Adjusted
	(In Thousands)						(In Thousands)
Sales	$	24,968	$	293	$	25,261	$	21,646	$	(487	)	$	21,159
Cost of sales		13,371		98		13,469		12,656		(220	)		12,436
Gross profit		11,597		195		11,792		8,990		(267	)		8,723
Income (loss) from operations		180		195		375		854		(267	)		587
Net income (loss)		79		68		147		172		(72	)		100
Net income (loss) per share	$	0.01	$	0.02	$	0.03	$	0.03	$	(0.01	)	$	0.02

	Quarter Ended March 31, 2014
	As Reported			Adjustment			As Adjusted
	(In Thousands)
Sales	$	7,259		$	(240	)	$	7,019
Cost of sales		4,685			(132	)		4,553
Gross profit		2,574			(108	)		2,466
Income (loss) from operations		(689	)		(108	)		(797	)
Net income (loss)		(367	)		(153	)		(520	)
Net income (loss) per share	$	(0.06	)	$	(0.03	)	$	(0.09	)

Schedule of Quarterly Financial Information [Table Text Block]

	First Quarter(1)			Second Quarter		Third Quarter(1)		Fourth Quarter (1)			Year
	(in thousands, except per share data)
201 5
Net sales	$	7,624		$	7,946	$	9,691	$	8,547		$	33,809
Gross profit		3,059			3,935		4,798		2,674			14,466
Net income (loss)		(381	)		64		463		(170	)		(24	)
Net income (loss) per share
Basic		(0.07	)		0.01		0.08		(0.03	)		(0.00	)
Diluted		(0.07	)		0.01		0.08		(0.03	)		(0.00	)

201 4
Net sales	$	6,405		$	7,353	$	7,401	$	7,019		$	28,178
Gross profit		2,578			2,989		3,156		2,466			11,189
Net income		(105	)		105		100		(520	)		(420	)
Net income per share
Basic		(0.02	)		0.02		0.02		(0.09	)		(0.08	)
Diluted		(0.02	)		0.02		0.02		(0.09	)		(0.08	)