Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (629)	$ 60	$ (2,144)	$ 70
Other comprehensive (loss) income, net of tax:
Net change in unrealized loss on investments	0	(3)	0	(3)
Net change in cumulative translation adjustments	(34)	1	(49)	60
Total comprehensive (loss) income	(663)	58	(2,193)	127
Less: Comprehensive income attributable to the noncontrolling interest	1	0	2	0
Comprehensive (loss) income, attributable to Aehr Test Systems common shareholders	$ (664)	$ 58	$ (2,195)	$ 127