Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Aug. 31, 2015	May. 31, 2015
Allowance for doubtful accounts receivable (in Dollars)	$ 1,607	$ 1,669
Common Stock, par value (in Dollars per share)	$ 0.00	$ 0.00
Common stock, shares authorized	100	100
Common stock, shares issued	100	100
Common stock, shares outstanding	100	100