3. EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2015	Nov. 30, 2014
Earnings Per Share [Abstract]
Numerator: Net loss	$ (1,048)	$ (2,114)	$ (754)	$ (3,021)
Denominator for basic net loss per share: Weighted average shares outstanding (in thousands)	13,048	11,724	13,005	11,557
Shares used in basic net loss per share calculation (in thousands)	13,048	11,724	13,005	11,557
Effect of dilutive securities (in thousands)	0	0	0	0
Denominator for diluted net loss per share (in thousands)	13,048	11,724	13,005	11,557
Basic net loss per share	$ (0.08)	$ (0.18)	$ (0.06)	$ (0.26)
Diluted net loss per share	$ (0.08)	$ (0.18)	$ (0.06)	$ (0.26)