Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (3,201)	$ 267	$ (5,345)	$ 337
Other comprehensive (loss) income, net of tax:
Net change in unrealized loss on investments	0	0	0	(3)
Net change in cumulative translation adjustments	10	37	(39)	97
Total comprehensive (loss) income	(3,191)	304	(5,384)	431
Less: Comprehensive (loss) income attributable to the noncontrolling interest	(1)	(1)	1	(1)
Comprehensive (loss) income, attributable to Aehr Test Systems common shareholders	$ (3,190)	$ 305	$ (5,385)	$ 432