Selected Consolidated Quarterly Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Summation of quarterly data [Abstract]
Net Sales	$ 5,541,000	$ 5,590,000	$ 5,710,000	$ 5,577,000	$ 5,597,000	$ 5,344,000	$ 4,968,000	$ 4,653,000	$ 22,417,980	$ 20,561,714	$ 13,787,032
Gross Profit	4,790,000	4,856,000	4,935,000	4,822,000	4,805,000	4,568,000	4,208,000	3,944,000	19,403,094	17,524,747	11,400,601
Net Loss	$ (969,000)	$ (677,000)	$ (640,000)	$ (1,019,000)	$ (573,000)	$ (1,068,000)	$ (1,278,000)	$ (1,331,000)	$ (3,305,146)	$ (4,250,371)	$ (4,648,303)
Basic and Diluted Net Loss per Share (in dollars per share)	$ (0.05)	$ (0.03)	$ (0.03)	$ (0.05)	$ (0.03)	$ (0.05)	$ (0.06)	$ (0.06)	$ (0.16)	$ (0.21)	$ (0.25)