Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Cash flows from operating activities:
Net loss	$ (169,417)	$ (65,386)	$ (26,411)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	24,813	19,934	14,007
Amortization (accretion) of premium (discount) on marketable debt securities, net	(1,154)	(683)	1,034
Stock-based compensation	111,316	111,158	87,801
Deferred income taxes	19,042	(3,936)	(4,426)
Other non-cash items, net	1,121	(751)	(509)
Changes in operating assets and liabilities:
Accounts receivable	27,037	(7,680)	(18,600)
Inventories	11,443	4,733	(18,944)
Prepaid expenses and other current assets	(961)	153	228
Other non-current assets	38	978	832
Accounts payable	10,658	(13,325)	9,822
Accrued and other current liabilities	(6,660)	5,225	(1,954)
Income taxes payable	(2,571)	2,867	83
Deferred revenue	(1,531)	1,012	(131)
Operating lease liabilities	(3,877)	(4,011)	(3,608)
Other long-term liabilities	(273)	(6,195)	(429)
Net cash provided by operating activities	19,024	44,093	38,795
Cash flows from investing activities:
Acquisition, net of cash acquired	0	0	(307,038)
Purchases of investments	(34,178)	(97,437)	(118,726)
Sales of investments	7,062	2,444	208,132
Maturities of investments	46,935	2,000	107,760
Purchase of tangible and intangible assets	(11,977)	(15,051)	(9,679)
Escrow claim associated with business acquisition	0	749	0
Net cash provided by (used in) investing activities	7,842	(107,295)	(119,551)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	10,536	10,585	15,292
Long-term financing payment for intangible assets	(6,030)	(4,887)	(4,767)
Net cash provided by financing activities	4,506	5,698	10,525
Net increase (decrease) in cash, cash equivalents and restricted cash	31,372	(57,504)	(70,231)
Cash, cash equivalents and restricted cash at beginning of period	113,549	171,053	241,284
Cash, cash equivalents and restricted cash at end of period	144,921	113,549	171,053
Supplemental disclosure of cash flow information:
Cash paid for income taxes	7,112	1,444	1,869
Supplemental disclosure of noncash investing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 6,880	$ 16,410	$ 1,569