Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2019	Aug. 31, 2018
Income Statement [Abstract]
Net sales	$ 5,533	$ 4,740
Cost of sales	3,262	3,187
Gross profit	2,271	1,553
Operating expenses:
Selling, general and administrative	1,808	1,879
Research and development	892	1,116
Total operating expenses	2,700	2,995
Loss from operations	(429)	(1,442)
Interest income (expense), net	12	(78)
Other income, net	10	9
Loss before income tax expense	(407)	(1,511)
Income tax expense	(6)	(4)
Net loss	(413)	(1,515)
Less: Net income attributable to the noncontrolling interest	0	0
Net loss attributable to Aehr Test Systems common shareholders	$ (413)	$ (1,515)
Net loss per share: Basic and Diluted	$ (0.02)	$ (0.07)
Shares used in per share calculations: Basic and Diluted	22,708	22,190