Condensed Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2011	Mar. 31, 2011
Condensed Balance Sheets
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 4,000	$ 9,000
Inventories, reserve for obsolescence (in dollars)	115,000	60,000
Patents, accumulated amortization (in dollars)	$ 163,822	$ 157,971
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	6,455,100	6,455,100
Common stock, shares outstanding	6,455,100	6,455,100