Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Oct. 31, 2013	Apr. 30, 2013
Preferred stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	12,421,318	12,414,659
Common stock, shares outstanding	9,017,329	9,023,290
Treasury stock, shares	3,403,989	3,391,369