Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Income Statement [Abstract]
Net sales	$ 6,111	$ 3,163	$ 18,518	$ 13,814
Cost of sales	3,120	2,891	10,054	9,591
Gross profit	2,991	272	8,464	4,223
Operating expenses:
Selling, general and administrative	1,891	1,850	5,856	5,706
Research and development	845	931	2,532	3,033
Restructuring	0	607	0	607
Total operating expenses	2,736	3,388	8,388	9,346
Income (loss) from operations	255	(3,116)	76	(5,123)
Interest income (expense), net	13	(76)	27	(228)
Other (expense) income, net	(9)	(11)	6	27
Income (loss) before tax (expense) benefit	259	(3,203)	109	(5,324)
Income tax (expense) benefit	(14)	2	(26)	(21)
Net income (loss)	245	(3,201)	83	(5,345)
Less: Net income attributable to the noncontrolling interest	0	0	0	0
Net income (loss) attributable to Aehr Test Systems common shareholders	$ 245	$ (3,201)	$ 83	$ (5,345)
Net income (loss) per share basic	$ 0.01	$ (0.14)	$ 0.00	$ (0.24)
Net income (loss) per share diluted	$ 0.01	$ (0.14)	$ 0.00	$ (0.24)
Shares used in per share calculations: basic (in thousands)	22,937	22,459	22,823	22,314
Shares used in per share calculations: diluted (in thousands)	23,130	22,459	22,940	22,314