CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Feb. 28, 2023	Feb. 28, 2022
Cash flows from operating activities:
Net income	$ 8,446	$ 3,656
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	2,095	2,186
Provision for doubtful accounts	24	0
Depreciation and amortization	337	262
Rent adjustment and amortization of lease incentives	10	(36)
Accretion of investment discount	(305)	0
Gain from forgiveness of PPP loan	0	(1,698)
Changes in operating assets and liabilities:
Trade and other accounts receivable	1,414	(3,454)
Inventories	(6,783)	(5,449)
Prepaid expenses and other assets	(167)	(28)
Accounts payable	822	444
Accrued expenses	(126)	375
Customer deposits and deferred revenue	(1,633)	5,999
Income taxes payable	9	18
Net cash provided by operating activities	4,143	2,275
Cash flows from investing activities:
Purchases of investments	(33,294)	0
Proceeds from maturities of investments	8,000	0
Purchases of property and equipment	(178)	(218)
Net cash used in investing activities	(25,472)	(218)
Cash flows from financing activities:
Line of credit repayments, net	0	(1,400)
Proceeds from issuance of common stock under employee plans	1,965	3,139
Shares repurchased for tax withholdings on vesting of restricted stock units	(1,680)	(369)
Proceeds from issuance of common stock from public offering, net of issuance costs	6,853	24,030
Net cash provided by financing activities	7,138	25,400
Effect of exchange rates on cash, cash equivalents and restricted cash	(35)	(19)
Net (decrease) increase in cash, cash equivalents and restricted cash	(14,226)	27,438
Cash, cash equivalents and restricted cash, beginning of period(1)	31,564	4,662
Cash, cash equivalents and restricted cash, end of period(1)	$ 17,338	$ 32,100