Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Income Statement [Abstract]
Net sales	$ 2,027	$ 5,612	$ 8,200	$ 14,314
Cost of sales	1,175	2,742	5,044	7,006
Gross profit	852	2,870	3,156	7,308
Operating expenses:
Selling, general and administrative	1,584	1,701	4,944	4,638
Research and development	1,031	907	3,095	2,386
Total operating expenses	2,615	2,608	8,039	7,024
(Loss) income from operations	(1,763)	262	(4,883)	284
Interest expense	(7)	(7)	(29)	(21)
Other income (expense), net	110	(21)	201	(85)
(Loss) income before income tax (expense) benefit	(1,660)	234	(4,711)	178
Income tax (expense) benefit	(66)	(22)	(36)	5
Net (loss) income	(1,726)	212	(4,747)	183
Less: Net income attributable to the noncontrolling interest	0	0	0	0
Net (loss) income attributable to Aehr Test Systems common shareholders	$ (1,726)	$ 212	$ (4,747)	$ 183
Net (loss) income per share - basic	$ (0.14)	$ 0.02	$ (0.40)	$ 0.02
Net (loss) income per share - diluted	$ (0.14)	$ 0.02	$ (0.40)	$ 0.02
Shares used in per share calculations - Basic	12,677	10,982	11,931	10,807
Shares used in per share calculations - Diluted	12,677	12,277	11,931	11,583