Condensed Consolidated Balance Sheets (Parentheticals) (USD $)	Sep. 30, 2013	Mar. 31, 2013
Allowance for doubtful accounts (in dollars)	$ 297,000	$ 297,000
Redeemable Series D Convertible Participating Preferred Stock, redemption and liquidation value (in dollars)	$ 3,922,221
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	2,500,000	2,500,000
Redeemable Series D Convertible Participating Preferred Stock, issued shares	2,500,000	2,500,000
Redeemable Series D Convertible Participating Preferred Stock, outstanding shares	2,500,000	2,500,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares	25,000,000	25,000,000
Common stock, shares issued	9,111,752	9,066,752
Common stock, shares outstanding	9,111,752	9,066,752
Treasury stock at cost, shares	448,647	425,304
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 shares
Preferred Stock, outstanding shares
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 shares
Preferred Stock, outstanding shares
Preferred stock, undesignated
Preferred Stock, authorized shares	3,650,000	3,650,000
Preferred Stock, issued shares
Preferred Stock, outstanding shares