Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Mar. 31, 2013
Consolidated Balance Sheets [Abstract]
Patent costs, accumulated amortization	$ 855,662	$ 845,795
Trademark costs, accumulated amortization	$ 65,351	$ 64,230
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	36,669,509	36,664,097
Common Stock, Shares, Outstanding	36,669,509	36,664,097