Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Sales, net	$ 5,586,000	$ 8,352,000	$ 11,802,000	$ 16,473,000
Cost of products sold	3,612,000	4,785,000	7,584,000	9,528,000
Gross profit	1,974,000	3,567,000	4,218,000	6,945,000
Operating expenses:
Research, development and engineering	1,342,000	1,714,000	2,713,000	3,406,000
Sales and marketing	496,000	565,000	1,001,000	1,180,000
General and administrative	1,119,000	1,300,000	2,172,000	2,459,000
Amortization expense	291,000	342,000	583,000	684,000
Total operating expenses	3,248,000	3,921,000	6,469,000	7,729,000
Loss from operations	(1,274,000)	(354,000)	(2,251,000)	(784,000)
Other income (expense):
Interest income		2,000		4,000
Interest expense	(30,000)	(31,000)	(63,000)	(62,000)
Interest expense, related parties		(13,000)		(28,000)
Change in fair value of warrant liability	(4,000)	142,000	13,000	634,000
Other income	21,000		21,000
Net loss	$ (1,287,000)	$ (254,000)	$ (2,280,000)	$ (236,000)
Basic & diluted loss per share	$ (0.04)	$ (0.01)	$ (0.07)	$ (0.01)
Weighted average common shares outstanding
Basic & diluted	31,161,000	30,827,000	31,161,000	30,756,000