Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Income Statement [Abstract]
Net sales	$ 2,681	$ 1,677	$ 12,215	$ 12,930
Cost of sales	2,178	1,508	8,043	7,687
Gross profit	503	169	4,172	5,243
Operating expenses:
Selling, general and administrative	1,724	1,695	5,147	5,253
Research and development	1,248	1,293	3,348	3,278
Total operating expenses	2,972	2,988	8,495	8,531
Loss from operations	(2,469)	(2,819)	(4,323)	(3,288)
Interest expense	(178)	(165)	(537)	(437)
Other (expense) income, net	(2)	(24)	38	7
Loss before income tax (expense) benefit	(2,649)	(3,008)	(4,822)	(3,718)
Income tax (expense) benefit	(2)	33	(36)	(11)
Net loss	(2,651)	(2,975)	(4,858)	(3,729)
Less: Net income attributable to the noncontrolling interest	0	0	0	0
Net loss attributable to Aehr Test Systems common shareholders	$ (2,651)	$ (2,975)	$ (4,858)	$ (3,729)
Net loss per share Basic and Diluted	$ (0.16)	$ (0.23)	$ (0.32)	$ (0.29)
Shares used in per share calculations: Basic and Diluted (in thousands)	16,672	13,164	15,411	13,058