Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 245	$ (3,201)	$ 83	$ (5,345)
Other comprehensive income (loss), net of tax:
Net change in cumulative translation adjustments	5	10	(15)	(39)
Total comprehensive income (loss)	250	(3,191)	68	(5,384)
Less: Comprehensive (loss) income attributable to the noncontrolling interest	0	(1)	(1)	1
Comprehensive income (loss), attributable to Aehr Test Systems common shareholders	$ 250	$ (3,190)	$ 69	$ (5,385)