Consolidated Balance Sheets (Parentheticals) (USD $)	Apr. 30, 2014	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	12,452,809	12,414,659
Common stock, shares outstanding	8,735,842	9,023,290
Treasury stock, shares	3,716,967	3,391,369