CONDENSED CONSOLIDATED BALANCE SHEETS [Parenthetical] (USD $)	Sep. 30, 2012	Mar. 31, 2012
Allowance for doubtful accounts (in dollars)	$ 57,000	$ 70,000
Net of allowance for obsolete inventory (in dollars)	$ 70,000	$ 70,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	2,312,759	2,336,354
Common stock, shares outstanding	2,312,759	2,336,354