Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2024	Oct. 31, 2023
Cash flows from operating activities:
Net loss	$ (96,892)	$ (108,810)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	19,234	18,402
Amortization (accretion) of premium (discount) on marketable debt securities, net	(491)	(957)
Stock-based compensation	80,495	82,796
Other non-cash items, net	262	(2,610)
Changes in operating assets and liabilities:
Accounts receivable	(9,017)	29,019
Inventories	(7,373)	9,703
Prepaid expenses and other current assets	(293)	1,539
Other non-current assets	120	105
Accounts payable	(3,282)	(8,553)
Accrued and other current liabilities	25,332	6,938
Income taxes payable	(703)	(1,721)
Deferred revenue	3,740	171
Operating lease liabilities	(2,937)	(2,940)
Other long-term liabilities	211	(26)
Net cash provided by operating activities	8,406	23,056
Cash flows from investing activities:
Purchase of investments	(57,343)	(34,433)
Sales of investments	17,866	5,222
Maturities of investments	15,613	44,310
Purchase of tangible and intangible assets	(6,196)	(10,047)
Net cash provided by (used in) investing activities	(30,060)	5,052
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	9,657	6,912
Long-term financing payment for intangible assets	(5,795)	(4,775)
Net cash provided by financing activities	3,862	2,137
Net increase (decrease) in cash, cash equivalents and restricted cash	(17,792)	30,245
Cash, cash equivalents and restricted cash at beginning of period	144,921	113,549
Cash, cash equivalents and restricted cash at end of period	127,129	143,794
Supplemental disclosure of cash flow information:
Cash paid for income taxes	2,236	5,499
Supplemental disclosure of noncash investing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 763	$ 6,868