Condensed Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2012	Mar. 31, 2012
Condensed Balance Sheets
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 4,500	$ 15,500
Inventories, reserve for obsolescence (in dollars)	125,000	117,000
Patents, accumulated amortization (in dollars)	$ 171,714	$ 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