Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015
Income Statement [Abstract]
Net sales	$ 4,216	$ 4,620	$ 9,534	$ 11,253
Cost of sales	2,753	2,929	5,865	6,179
Gross profit	1,463	1,691	3,669	5,074
Operating expenses:
Selling, general and administrative	1,707	1,713	3,423	3,558
Research and development	1,040	923	2,100	1,985
Total operating expenses	2,747	2,636	5,523	5,543
Loss from operations	(1,284)	(945)	(1,854)	(469)
Interest expense	(181)	(137)	(359)	(272)
Other income, net	43	55	40	31
Loss before income tax expense	(1,422)	(1,027)	(2,173)	(710)
Income tax expense	(30)	(21)	(34)	(44)
Net loss	(1,452)	(1,048)	(2,207)	(754)
Less: Net income attributable to the noncontrolling interest	0	0	0	0
Net loss attributable to Aehr Test Systems common shareholders	$ (1,452)	$ (1,048)	$ (2,207)	$ (754)
Net loss per share Basic and Diluted	$ (0.09)	$ (0.08)	$ (0.15)	$ (0.06)
Shares used in per share calculations: Basic and Diluted (in thousands)	16,029	13,048	14,673	13,005