Condensed Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2015	Mar. 31, 2015
Condensed Balance Sheets
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 11,000	$ 11,500
Inventories, reserve for obsolescence (in dollars)	262,000	240,000
Accumulated amortization	$ 165,157	$ 153,494
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	10,673,225	10,673,225
Common stock and additional paid-in capital, shares outstanding	10,673,225	10,673,225