Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 28, 2012	Dec. 30, 2011
Sales, net	$ 5,834,000	$ 6,518,000	$ 17,636,000	$ 22,991,000
Cost of products sold	3,381,000	3,828,000	10,965,000	13,356,000
Gross profit	2,453,000	2,690,000	6,671,000	9,635,000
Operating expenses:
Research, development and engineering	1,558,000	1,660,000	4,271,000	5,066,000
Sales and marketing	527,000	484,000	1,528,000	1,664,000
General and administrative	1,087,000	1,062,000	3,259,000	3,521,000
Amortization expense	293,000	344,000	876,000	1,028,000
Total operating expenses	3,465,000	3,550,000	9,934,000	11,279,000
Loss from operations	(1,012,000)	(860,000)	(3,263,000)	(1,644,000)
Other income (expense):
Interest income	7,000	1,000	7,000	5,000
Interest expense	(34,000)	(30,000)	(97,000)	(93,000)
Interest expense, related parties		(10,000)		(38,000)
Change in fair value of warrant liability	13,000	84,000	26,000	719,000
Other income		3,000	22,000	3,000
Net loss	$ (1,026,000)	$ (812,000)	$ (3,305,000)	$ (1,048,000)
Basic & diluted loss per share	$ (0.03)	$ (0.03)	$ (0.11)	$ (0.03)
Weighted average common shares outstanding
Basic & diluted	31,161,000	30,972,000	31,161,000	30,828,000