Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 9,450	$ (2,027)	$ (2,802)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Stock-based compensation	3,006	1,101	910
Depreciation and amortization	307	310	384
Loss on disposal of property plant equipment	0	0	45
Net gain from dissolution of Aehr Test Systems Japan	0	(2,186)	0
Income tax benefit related to dissolution of Aehr Test Systems Japan	0	(215)	0
Gain from forgiveness of PPP loan	1,698	0	0
Changes in operating assets and liabilities:
Accounts receivable	(7,834)	(1,373)	1,161
Inventories	(6,674)	(972)	1,164
Prepaid expenses and other	(71)	(81)	271
Accounts payable	1,356	1,877	(1,024)
Accrued expenses	1,464	732	(589)
Customer deposits and deferred revenue	2,196	96	(1,542)
Other long-term liabilities	0	47	0
Income taxes payable	6	(10)	(2)
Net cash provided by (used in) operating activities	1,508	(2,701)	(2,024)
Cash flows from investing activities:
Purchases of property and equipment	(416)	(227)	(163)
Net cash used in investing activities	(416)	(227)	(163)
Cash flows from financing activities:
Proceeds from long-term debt	0	0	1,679
Line of credit (repayments) borrowings, net	(1,400)	1,400	0
Proceeds from issuance of common stock under employee plans	3,560	580	503
Shares repurchased for tax withholdings on vesting of restricted stock units	(429)	(20)	(10)
Proceeds from issuance of common stock from public offering, net of issuance costs	24,030	0	0
Net cash provided by financing activities	25,761	1,960	2,172
Effect of exchange rates on cash, cash equivalents and restricted cash	49	117	20
Net increase (decrease) in cash, cash equivalents and restricted cash	26,902	(851)	5
Cash, cash equivalents and restricted cash, beginning of year	4,662	5,513	5,508
Cash, cash equivalents and restricted cash, end of year	31,564	4,662	5,513
Supplemental cash flow information:
Income taxes, net	4	15	42
Interest, net	12	6	0
Supplemental disclosure of non-cash flow information:
Net transfer of equipment between inventory and property and equipment	$ 472	$ 113	$ 112