CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Net sales	$ 5,709,840	$ 4,967,621	$ 11,286,963	$ 9,620,743
Cost of goods sold	774,963	759,336	1,530,550	1,468,901
Gross profit	4,934,877	4,208,285	9,756,413	8,151,842
Operating expenses
General and administrative	1,027,835	942,557	2,119,681	1,964,415
Research and development	598,933	456,871	1,161,974	912,631
Selling and marketing	3,734,042	3,869,875	7,698,877	7,464,017
Amortization	215,681	214,056	431,290	426,371
Total operating expenses	5,576,491	5,483,359	11,411,822	10,767,434
Operating loss	(641,614)	(1,275,074)	(1,655,409)	(2,615,592)
Other income (expense)
Interest income	10,931	13,716	23,509	31,550
Interest Expense	0	(57)	0	(57)
Foreign currency exchange gain (loss)	5,794	(8,587)	(3,877)	(3,279)
Total other income (expense)	16,725	5,072	19,632	28,214
Loss before income taxes	(624,889)	(1,270,002)	(1,635,777)	(2,587,378)
Income tax expense	14,637	8,485	23,104	22,416
Net loss	$ (639,526)	$ (1,278,487)	$ (1,658,881)	$ (2,609,794)
Basic and diluted loss per common share (in dollars per share)	$ (0.03)	$ (0.06)	$ (0.08)	$ (0.13)
Weighted average common shares outstanding:
Basic and diluted (in shares)	20,763,345	20,688,919	20,753,368	20,659,017