Selected Consolidated Quarterly Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Summation of quarterly data [Abstract]
Net Sales	$ 6,360,735	$ 6,398,675	$ 5,976,875	$ 5,840,841	$ 5,541,000	$ 5,590,000	$ 5,710,000	$ 5,577,000	$ 24,577,126	$ 22,417,980	$ 20,561,714
Gross Profit	5,579,080	5,620,408	5,235,033	5,092,794	4,790,000	4,856,000	4,935,000	4,822,000	21,527,315	19,403,094	17,524,747
Net Loss	$ (1,145,486)	$ (670,832)	$ (1,927,480)	$ (1,609,292)	$ (969,000)	$ (677,000)	$ (640,000)	$ (1,019,000)	$ (5,353,090)	$ (3,305,146)	$ (4,250,371)
Basic and Diluted Net Loss per Share (in dollars per share)	$ (0.05)	$ (0.03)	$ (0.09)	$ (0.08)	$ (0.05)	$ (0.03)	$ (0.03)	$ (0.05)	$ (0.25)	$ (0.16)	$ (0.21)