Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
Income Statement [Abstract]
Net sales	$ 10,018	$ 19,684	$ 16,488
Cost of sales	6,180	9,462	9,712
Gross profit	3,838	10,222	6,776
Operating expenses:
Selling, general and administrative	6,470	6,323	6,872
Research and development	4,062	3,402	3,211
Total operating expenses	10,532	9,725	10,083
(Loss) income from operations	(6,694)	497	(3,307)
Interest expense	(130)	(26)	(49)
Other income (expense), net	211	(64)	(33)
(Loss) income before income tax (expense) benefit	(6,613)	407	(3,389)
Income tax (expense) benefit	(34)	15	(30)
Net (loss) income	(6,647)	422	(3,419)
Less: Net income attributable to the noncontrolling interest	0	0	0
Net (loss) income attributable to Aehr Test Systems common shareholders	$ (6,647)	$ 422	$ (3,419)
Net (loss) income per share - basic and diluted	$ (0.55)	$ 0.04	$ (0.36)
Shares used in per share calculation - basic	12,047,000	10,877,000	9,549,000
Shares used in per share calculation - diluted	12,047,000	11,889,000	9,549,000