Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,975)	$ (1,726)	$ (3,729)	$ (4,747)
Other comprehensive income (loss), net of tax: Net change in cumulative translation adjustment	23	(111)	(19)	(223)
Total comprehensive loss	(2,952)	(1,837)	(3,748)	(4,970)
Less: Comprehensive (loss) income attributable to the noncontrolling interest	(1)	0	(1)	3
Comprehensive loss, attributable to Aehr Test Systems	$ (2,951)	$ (1,837)	$ (3,747)	$ (4,973)