Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Income Statement [Abstract]
Net sales	$ 4,740	$ 6,970
Cost of sales	3,187	4,052
Gross profit	1,553	2,918
Operating expenses:
Selling, general and administrative	1,879	1,791
Research and development	1,116	955
Total operating expenses	2,995	2,746
(Loss) income from operations	(1,442)	172
Interest expense, net	(78)	(107)
Other income (expense), net	9	(60)
(Loss) income before income tax (expense) benefit	(1,511)	5
Income tax (expense) benefit	(4)	5
Net (loss) income	(1,515)	10
Less: Net income attributable to the noncontrolling interest	0	0
Net (loss) income attributable to Aehr Test Systems common shareholders	$ (1,515)	$ 10
Net (loss) income per share basic	$ (0.07)	$ .00
Net (loss) income per share diluted	$ (0.07)	$ .00
Shares used in per share calculations: basic (in thousands)	22,190	21,417
Shares used in per share calculations: diluted (in thousands)	22,190	22,991