CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Allowance for doubtful accounts (in dollars)	$ 297,000	$ 317,000
Redeemable Series D Convertible Participating Preferred Stock, Redemption and Liquidation Value (in dollars)	$ 3,732,681	$ 3,732,681
Redeemable Series D Convertible Participating Preferred Stock, par value (in dollars per share)	$ 1.00	$ 1.00
Redeemable Series D Convertible Participating Preferred Stock, designated shares (in shares)	2,500,000	2,500,000
Redeemable Series D Convertible Participating Preferred Stock, issued shares (in shares)	2,500,000	2,500,000
Redeemable Series D Convertible Participating Preferred Stock, outstanding shares (in shares)	2,500,000	2,500,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	9,066,752	8,820,815
Common stock, shares outstanding (in shares)	8,641,448	8,765,827
Treasury stock at cost, shares (in shares)	425,304	54,988
Class A convertible preferred stock
Preferred Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred Stock, authorized shares	650,000	650,000
Preferred Stock, issued
Preferred Stock, outstanding
Class B convertible preferred stock
Preferred Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred Stock, authorized shares	700,000	700,000
Preferred Stock, issued
Preferred Stock, outstanding
Preferred stock, undesignated
Preferred Stock, authorized shares	3,650,000	3,650,000
Preferred Stock, issued
Preferred Stock, outstanding