CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Cash flows from operating activities:
Net Income (Loss)	$ 14,557	$ 9,450	$ (2,027)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Stock-based compensation	2,748	3,006	1,101
Provision for doubtful accounts	24	0	0
Depreciation and amortization	450	356	328
Non-cash operating lease expense	88	(49)	(18)
Accretion of investment discount	(576)	0	0
Net gain from dissolution of Aehr Test Systems Japan	0	0	(2,186)
Income tax benefit related to dissolution of Aehr Test Systems Japan	0	0	(215)
Gain from forgiveness of PPP loan	0	(1,698)	0
Changes in operating assets and liabilities:
Trade and other accounts receivable	(3,788)	(7,834)	(1,373)
Inventories	(9,469)	(6,674)	(972)
Prepaid expenses and other	28	(71)	(81)
Accounts payable	5,044	1,356	1,877
Accrued expenses	528	1,464	732
Customer deposits and deferred revenue	369	2,196	96
Other long-term liabilities	0	0	47
Income taxes payable	8	6	(10)
Net cash provided by (used in) operating activities	10,011	1,508	(2,701)
Cash flows from investing activities:
Purchases of investments	(33,294)	0	0
Proceeds from maturities of investments	16,000	0	0
Purchases of property and equipment	(1,362)	(416)	(227)
Net cash used in investing activities	(18,656)	(416)	(227)
Cash flows from financing activities:
Line of credit (repayments)borrowings, net	0	(1,400)	(1,400)
Proceeds from issuance of common stock under employee plans	2,562	3,560	580
Shares repurchased for tax withholdings on vesting of restricted stock units	(2,060)	(429)	(20)
Proceeds from issuance of common stock from public offering, net of issuance costs	6,820	24,030	0
Net cash provided by financing activities	7,322	25,761	1,960
Effect of exchange rates on cash, cash equivalents and restricted cash	(37)	49	117
Net (decrease) increase in cash, cash equivalents and restricted cash	(1,360)	26,902	(851)
Cash, cash equivalents and restricted cash, beginning of year	31,564	4,662	5,513
Cash, cash equivalents and restricted cash, end of year	30,204	31,564	4,662
Cash paid during the year for:
Income taxes	21	4	15
Interest	15	12	6
Supplemental disclosure of non-cash flow information:
Net transfer of equipment between inventory and property and equipment	$ 646	$ 472	$ 113