Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Cash flows from operating activities:
Net loss	$ (37,932)	$ (35,902)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	6,354	5,824
Amortization (accretion) of premium (discount) on marketable debt securities, net	(205)	(369)
Stock-based compensation	26,036	27,265
Deferred income taxes	119	846
Other non-cash items, net	478	64
Changes in operating assets and liabilities:
Accounts receivable	(3,349)	22,162
Inventories	928	(737)
Prepaid expenses and other current assets	(702)	(810)
Other non-current assets	(13)	106
Accounts payable	(12,037)	7,780
Accrued and other current liabilities	5,806	(2,613)
Income taxes payable	(637)	(493)
Deferred revenue	1,115	(152)
Operating lease liabilities	(983)	(968)
Other long-term liabilities	71	22
Net cash provided by (used in) operating activities	(14,951)	22,025
Cash flows from investing activities:
Purchase of investments	(6,653)	(19,790)
Sales of investments	7,195	1,468
Maturities of investments	2,725	12,410
Purchase of tangible and intangible assets	(1,132)	(2,298)
Net cash provided by (used in) investing activities	2,135	(8,210)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	2,903	2,592
Long-term financing payment for intangible assets	(3,191)	(2,207)
Net cash provided by (used in) financing activities	(288)	385
Net increase (decrease) in cash, cash equivalents and restricted cash	(13,104)	14,200
Cash, cash equivalents and restricted cash at beginning of period	144,921	113,549
Cash, cash equivalents and restricted cash at end of period	131,817	127,749
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1,084	1,251
Supplemental disclosure of noncash investing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 298	$ 825