3. EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Earnings Per Share [Abstract]
Numerator: Net income (loss)	$ 10	$ (755)
Denominator for basic net income (loss) per share: Weighted average shares outstanding (in thousands)	21,417	13,317
Shares used in basic net income (loss) per share calculation (in thousands)	21,417	13,317
Effect of dilutive securities (in thousands)	1,574	0
Denominator for diluted net income (loss) per share (in thousands)	22,991	13,317
Basic net income (loss) per share	$ 0.00	$ (0.06)
Diluted net income (loss) per share	$ 0.00	$ (0.06)