CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 22,417,980	$ 20,561,714	$ 13,787,032
Cost of goods sold	3,014,886	3,036,967	2,386,431
Gross profit	19,403,094	17,524,747	11,400,601
Operating expenses
General and administrative	4,187,819	3,732,623	3,442,952
Research and development	2,415,123	1,905,366	1,719,532
Selling and marketing	15,238,600	15,296,217	10,092,062
Amortization	862,833	856,995	843,602
Total operating expenses	22,704,375	21,791,201	16,098,148
Operating loss	(3,301,281)	(4,266,454)	(4,697,547)
Other income (expense)
Interest income	46,039	60,072	72,426
Interest expense	(707)	(57)	(5,067)
Foreign currency exchange gain	1,573	3,780	10,722
Total other income (expenses)	46,905	63,795	78,081
Loss before income taxes	(3,254,376)	(4,202,659)	(4,619,466)
Income tax expense	50,770	47,712	28,837
Net loss	$ (3,305,146)	$ (4,250,371)	$ (4,648,303)
Basic and diluted net loss per share (in dollars per share)	$ (0.16)	$ (0.21)	$ (0.25)
Weighted average common shares outstanding:
Basic and diluted (in shares)	20,777,238	20,689,819	18,874,009