Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Income Statement [Abstract]
Net sales	$ 6,970	$ 5,318
Cost of sales	4,052	3,112
Gross profit	2,918	2,206
Operating expenses:
Selling, general and administrative	1,791	1,716
Research and development	955	1,060
Total operating expenses	2,746	2,776
Income (loss) from operations	172	(570)
Interest expense, net	(107)	(178)
Other expense, net	(60)	(3)
Income (loss) before income tax benefit (expense)	5	(751)
Income tax benefit (expense)	5	(4)
Net income (loss)	10	(755)
Less: Net income attributable to the noncontrolling interest	0	0
Net income (loss) attributable to Aehr Test Systems common shareholders	$ 10	$ (755)
Net income (loss) per share basic	$ 0.00	$ (0.06)
Net income (loss) per share diluted	$ 0.00	$ (0.06)
Shares used in per share calculations: basic (in thousands)	21,417	13,317
Shares used in per share calculations: diluted (in thousands)	22,991	13,317