2. ACCOUNTS RECEIVABLE (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	May 31, 2013	May 31, 2012
Accounts Receivable Details
Accounts receivable, Beginning	$ 2,588	$ 2,627
Allowance for doubtful accounts, Beginning	(39)	(23)
Allowance for doubtful accounts, Additions	0	(16)
Allowance for doubtful accounts, Deductions	0	0
Allowance for doubtful accounts, Ending	(39)	(39)
Accounts receivable, Ending	$ 2,632	$ 2,588