4. FAIR VALUE OF FINANCIAL INSTRUMENTS (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2015	Nov. 30, 2014
Fair Value Of Financial Instruments Details Narrative
Transfers between Level 1 and Level 2 fair value measurements	$ 0	$ 0	$ 0	$ 0