CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2023	Aug. 31, 2022
Cash flows from operating activities:
Net income	$ 4,674	$ 589
Stock-based compensation expense	522	710
Depreciation and amortization	138	104
Accretion of investment discount	(130)	0
Non-cash lease expenses	172	177
Changes in operating assets and liabilities:
Accounts receivable	3,437	7,648
Inventories	(7,704)	(2,323)
Prepaid expenses and other current assets	90	(210)
Accounts payable	(939)	(769)
Accrued expenses	355	(1,130)
Deferred revenue	3,294	855
Operating lease liabilities	(28)	(192)
Income taxes payable	20	2
Net cash provided by operating activities	3,901	5,461
Cash flows from investing activities:
Purchases of property and equipment	(284)	(84)
Proceeds from maturities of investments	18,000	0
Net cash provided by (used in) investing activities	17,716	(84)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee plans	318	455
Shares repurchased for tax withholdings on vesting of restricted stock units, amount	(1,012)	(1,179)
Net cash used in financing activities	(694)	(724)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(22)	10
Net increase in cash, cash equivalents and restricted cash	20,901	4,663
Cash, cash equivalents and restricted cash, beginning of period (1)	30,204	31,564
Cash, cash equivalents and restricted cash, end of period (1)	$ 51,105	$ 36,227