Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (2,802)	$ (5,235)	$ 528
Other comprehensive income (loss), net of tax:
Foreign currency translation income (loss)	2	(61)	42
Total comprehensive (loss) income	(2,800)	(5,296)	570
Less: Comprehensive (loss) income attributable to noncontrolling interest	(2)	1	(1)
Comprehensive (loss) income, attributable to Aehr Test Systems	$ (2,798)	$ (5,297)	$ 571