Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Feb. 28, 2015	May 31, 2014
Allowance for doubtful accounts receivable (in Dollars)	$ 1,108	$ 898
Common Stock, par value (in Dollars per share)	$ 0.00	$ 0.00
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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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