2. ACCOUNTS RECEIVABLE (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	May 31, 2014	May 31, 2013
Accounts Receivable Details
Accounts receivable, Gross	$ 3,441	$ 2,671
Allowance for doubtful accounts, Beginning	(39)	(39)
Allowance for doubtful accounts, Additions charged to costs and expenses	(15)	0
Allowance for doubtful accounts, Deductions	3	0
Allowance for doubtful accounts, Ending	(51)	(39)
Accounts receivable, Net	$ 3,390	$ 2,632