Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2011
Consolidated Statements Of Comprehensive Loss
Net loss	$ (3,419)	$ (3,389)	$ (3,373)
Other comprehensive loss, net of tax: Foreign currency translation loss	(14)	(135)	(97)
Total comprehensive Loss	(3,433)	(3,524)	(3,470)
Less: Comprehensive income attributable to noncontrolling interest	0	1	16
Comprehensive loss, attributable to Aehr Test Systems	$ (3,433)	$ (3,525)	$ (3,486)