Condensed Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Mar. 31, 2013
Condensed Balance Sheets
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 16,000	$ 9,000
Inventories, reserve for obsolescence (in dollars)	55,000	51,000
Patents, accumulated amortization (in dollars)	$ 196,866	$ 190,770
Preferred stock, par value	$ 0	$ 0
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock and additional paid-in capital, par value	$ 0	$ 0
Common stock and additional paid-in capital, shares authorized	100,000,000	100,000,000
Common stock and additional paid-in capital, shares issued	8,210,100	8,210,100
Common stock and additional paid-in capital, shares outstanding	8,210,100	8,210,100