Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net sales	$ 3,968	$ 3,739	$ 7,620	$ 7,135
Cost of sales	2,773	2,669	5,345	5,152
Gross profit	1,195	1,070	2,275	1,983
Selling, general, and administrative expenses	2,050	3,164	5,100	5,894
Research and development expenses	428	527	847	1,014
Operating loss	(1,283)	(2,621)	(3,672)	(4,925)
Interest income	1	1	1	2
Interest expense	(44)	(237)	(85)	(431)
Other, net	6	(35)	2	(40)
Debt cost expense		(128)		(272)
Loss on extinguishment of debt		(1,244)		(1,244)
Loss before provision for income taxes	(1,320)	(4,264)	(3,754)	(6,910)
Income tax provision	3		3	1
Net loss	$ (1,323)	$ (4,264)	$ (3,757)	$ (6,911)
Net loss per common share - basic and diluted (in Dollars per share)	$ (0.03)	$ (0.09)	$ (0.08)	$ (0.15)
Weighted average shares used in computing net loss per common share - basic and diluted (in Shares)	46,144	45,974	46,127	45,827