2. ACCOUNTS RECEIVABLE (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2016	May 31, 2015
Accounts Receivable Details
Accounts receivable, Gross	$ 530	$ 1,404
Allowance for doubtful accounts, Beginning	(21)	(51)
Allowance for doubtful accounts, Additions charged to costs and expenses	0	0
Allowance for doubtful accounts, Deductions	13	30
Allowance for doubtful accounts, Ending	(8)	(21)
Accounts receivable, Net	$ 522	$ 1,383