Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2019	Aug. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (413)	$ (1,515)
Other comprehensive loss, net of tax:
Net change in cumulative translation adjustments	(15)	(15)
Total comprehensive loss	(428)	(1,530)
Less: Comprehensive (loss) income attributable to the noncontrolling interest	(1)	1
Comprehensive loss, attributable to Aehr Test Systems common shareholders	$ (427)	$ (1,531)