3. EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Aug. 31, 2015	Aug. 31, 2014
Earnings Per Share [Abstract]
Numerator: Net income (loss)	$ 294	$ (907)
Denominator for basic net income (loss) per share: Weighted average shares outstanding (in thousands)	12,963	11,391
Shares used in basic net income (loss) per share calculation (in thousands)	12,963	11,391
Effect of dilutive securities (in thousands)	851	0
Denominator for diluted net income (loss) per share (in thousands)	13,814	11,391
Basic net income (loss) per share	$ 0.02	$ (0.08)
Diluted net income (loss) per share	$ 0.02	$ (0.08)