CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Sales, net	$ 29,495,000	$ 28,838,000
Cost of products sold	17,637,000	16,479,000
Gross profit	11,858,000	12,359,000
Operating expenses:
Research and development expenses	6,541,000	5,631,000
Sales and marketing expenses	2,195,000	1,888,000
General and administrative expenses	4,412,000	4,032,000
Amortization expense - intangible assets	1,374,000	1,633,000
Total operating expenses	14,522,000	13,184,000
Loss from operations	(2,664,000)	(825,000)
Other income (expense):
Interest income	5,000	5,000
Interest expense on bank and MEDC/MSF loans	(123,000)	(176,000)
Interest expense, related parties	(41,000)	(61,000)
Change in fair value of warrant liability	706,000	(491,000)
Loss on debt extinguishment		(318,000)
Other income (expense)	5,000	(16,000)
Total other income (expense)	552,000	(1,057,000)
Loss before benefit for income taxes	(2,112,000)	(1,882,000)
Benefit for income taxes
Net loss	$ (2,112,000)	$ (1,882,000)
Basic and diluted loss per share	$ (0.07)	$ (0.07)
Weighted average common shares outstanding	30,873,000	26,366,000