Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Nov. 30, 2012	May 31, 2012
Allowance for doubtful accounts receivable (in Dollars)	$ 628	$ 612
Common stock, par value (in Dollars per share)	$ 0.00	$ 0.00
Common stock, shares authorized (in Shares)	100	100
Common stock, shares issued (in Shares)	100	100
Common stock, shares outstanding (in Shares)	100	100