Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Income Statement [Abstract]
Net sales	$ 6,874	$ 5,911	$ 12,407	$ 10,651
Cost of sales	3,672	3,513	6,934	6,700
Gross profit	3,202	2,398	5,473	3,951
Operating expenses:
Selling, general and administrative	2,157	1,977	3,965	3,856
Research and development	795	986	1,687	2,102
Total operating expenses	2,952	2,963	5,652	5,958
Income (loss) from operations	250	(565)	(179)	(2,007)
Interest income (expense), net	2	(74)	14	(152)
Other income, net	5	29	15	38
Income (loss) before income tax expense	257	(610)	(150)	(2,121)
Income tax expense	(6)	(19)	(12)	(23)
Net income (loss)	251	(629)	(162)	(2,144)
Less: Net income attributable to the noncontrolling interest	0	0	0	0
Net income (loss) attributable to Aehr Test Systems common shareholders	$ 251	$ (629)	$ (162)	$ (2,144)
Net income (loss) per share basic	$ 0.01	$ (0.03)	$ (0.01)	$ (0.10)
Net income (loss) per share diluted	$ 0.01	$ (0.03)	$ (0.01)	$ (0.10)
Shares used in per share calculations: basic (in thousands)	22,823	22,294	22,765	22,242
Shares used in per share calculations: diluted (in thousands)	22,912	22,294	22,765	22,242