CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Net sales	$ 5,590,431	$ 5,344,188	$ 16,877,394	$ 14,964,932
Cost of goods sold	734,171	776,538	2,264,721	2,245,440
Gross profit	4,856,260	4,567,650	14,612,673	12,719,492
Operating expenses
General and administrative	1,058,558	924,524	3,178,239	2,888,939
Research and development	533,867	586,439	1,695,841	1,499,070
Selling and marketing	3,725,530	3,902,952	11,424,407	11,366,969
Amortization	215,681	215,164	646,971	641,535
Total operating expenses	5,533,636	5,629,079	16,945,458	16,396,513
Operating loss	(677,376)	(1,061,429)	(2,332,785)	(3,677,021)
Other income (expense)
Interest income	12,327	14,268	35,836	45,818
Interest expense	(12)	0	(12)	(57)
Foreign currency exchange gain (loss)	445	(11,025)	(3,432)	(14,304)
Total other income (expense)	12,760	3,243	32,392	31,457
Loss before income taxes	(664,616)	(1,058,186)	(2,300,393)	(3,645,564)
Income tax expense	12,708	9,352	35,812	31,768
Net loss	$ (677,324)	$ (1,067,538)	$ (2,336,205)	$ (3,677,332)
Basic and diluted net loss per common share (in dollars per share)	$ (0.03)	$ (0.05)	$ (0.11)	$ (0.18)
Weighted average common shares outstanding:
Basic and diluted (in shares)	20,798,997	20,718,347	20,768,632	20,678,865