Consolidated Statements of Shareholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock	Aehr Test Systems Shareholders Equity [Member]	Additional Paid-In Capital	Accumulated other comprehensive loss	Retained Earnings (Accumulated Deficit)	Noncontrolling Interest
Balance, shares at May. 31, 2019		22,669,000
Balance, amount at May. 31, 2019	$ 15,453	$ 227	$ 15,472	$ 84,499	$ 2,230	$ (71,484)	$ (19)
Issuance of common stock under employee plans, shares		444,000
Issuance of common stock under employee plans, amount	$ 503	$ 4	503	499	0	0	0
Shares repurchased for tax withholdings on vesting of RSUs, shares	6,000	6,000
Shares repurchased for tax withholdings on vesting of RSUs, amount	$ (10)		(10)	(10)	0	0	0
Stock-based compensation	910	$ 0	910	910	0	0	0
Net loss	(2,802)	0	(2,802)	0	0	(2,802)	0
Foreign currency translation adjustment	2	0	4	0	4	0	(2)
Reclassification of cumulative translation adjustment	0
Balance, amount at May. 31, 2020	14,056	$ 231	$ 14,077	85,898	2,234	(74,286)	(21)
Balance, shares at May. 31, 2020		23,107,000	23,725,000
Issuance of common stock under employee plans, shares		627,000	(62,000)
Issuance of common stock under employee plans, amount	$ 580	$ 6	$ 580	574	0	0	0
Shares repurchased for tax withholdings on vesting of RSUs, shares	9,000	9,000
Shares repurchased for tax withholdings on vesting of RSUs, amount	$ (20)	$ 0	(20)	(20)	0	0	0
Stock-based compensation	1,101	0	1,101	1,101	0	0	0
Net loss	(2,027)	0	(2,027)	0	0	(2,027)	0
Foreign currency translation adjustment	160	0	139	0	139	0	21
Reclassification of cumulative translation adjustment	(2,401)	0	(2,401)	0	(2,401)	0	0
Balance, amount at May. 31, 2021	11,449	$ 237	11,449	87,553	(28)	(76,313)	0
Balance, shares at May. 31, 2021		23,725,000
Issuance of common stock under employee plans, shares		1,760,000
Issuance of common stock under employee plans, amount	$ 3,560	$ 17	3,560	3,543	0	0	0
Shares repurchased for tax withholdings on vesting of RSUs, shares	40,000	62,000
Shares repurchased for tax withholdings on vesting of RSUs, amount	$ (429)	$ 0	(429)	(429)	0	0	0
Stock-based compensation	3,006	0	3,006	3,006	0	0	0
Net loss	9,450	0	9,450	0	0	9,450	0
Foreign currency translation adjustment	(77)	$ 0	(77)	0	(77)	0	0
Reclassification of cumulative translation adjustment	0
Proceeds from public offerings, Net of issuance costs, shares		1,697,000
Proceeds from public offerings, Net of issuance costs, amount	24,030	$ 17	24,030	24,013	0	0	0
Balance, amount at May. 31, 2022	$ 50,989	$ 271	$ 50,989	$ 117,686	$ (105)	$ (66,863)	$ 0
Balance, shares at May. 31, 2022		27,120,000