CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Nov. 30, 2023	Nov. 30, 2022
Cash flows from operating activities:
Net income	$ 10,763	$ 4,314
Stock-based compensation expense	1,160	1,503
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	283	225
Accretion of investment discount	(130)	(64)
Amortization of operating lease right-of-use assets	337	356
Provision for doubtful accounts	0	24
Changes in operating assets and liabilities:
Accounts receivable	12,037	2,618
Inventories	(9,996)	(3,094)
Prepaid expenses and other current assets	(2,245)	(196)
Accounts payable	(5,099)	(210)
Accrued expenses	(974)	(1,045)
Deferred revenue	(2,703)	1,221
Operating lease liabilities	(89)	(390)
Income taxes payable	12	4
Net cash provided by operating activities	3,356	5,266
Cash flows from investing activities:
Purchases of property and equipment	(440)	(99)
Proceeds from maturities of investments	18,000	0
Purchases of investments	0	(17,652)
Net cash provided by (used in) investing activities	17,560	(17,751)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee plans	1,092	1,112
Shares repurchased for tax withholdings on vesting of restricted stock units, amount	$ (1,460)	(1,216)
Issuance cost of common stock offering	(72,000)
Net cash used in financing activities	$ (440)	(104)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(16)	(21)
Net increase (decrease) in cash, cash equivalents and restricted cash	20,460	(12,610)
Cash, cash equivalents and restricted cash, beginning of period (1)	30,204	31,564
Cash, cash equivalents and restricted cash, end of period (1)	$ 50,664	$ 18,954