Consolidated Balance Sheets Parenthetical (Parentheticals) (USD $)	Apr. 30, 2012	Apr. 30, 2011
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	6,000,000	6,000,000
Common stock, shares issued	5,515,750	5,828,650
Common Stock, Shares, Outstanding	5,515,750	5,828,650