Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Balance Sheets
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 9,000	$ 15,500
Inventories, reserve for obsolescence (in dollars)	51,000	117,000
Patents, accumulated amortization (in dollars)	$ 190,770	$ 169,084
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, shares authorized	100,000,000	100,000,000
Common stock and additional paid-in capital, shares issued	8,210,100	7,955,100
Common stock and additional paid-in capital, shares outstanding	8,210,100	7,955,100