Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Cash flows from operating activities:
Net loss	$ (117,126)	$ (169,417)	$ (65,386)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	26,060	24,813	19,934
Amortization (accretion) of premium (discount) on marketable debt securities, net	(582)	(1,154)	(683)
Stock-based compensation	107,803	111,316	111,158
Deferred income taxes	(119)	19,042	(3,936)
Other non-cash items, net	502	1,121	(751)
Changes in operating assets and liabilities:
Accounts receivable	(4,817)	27,037	(7,680)
Inventories	(5,213)	11,443	4,733
Prepaid expenses and other current assets	143	(961)	153
Other non-current assets	(75)	38	978
Accounts payable	(9,581)	10,658	(13,325)
Accrued and other current liabilities	30,383	(6,660)	5,225
Income taxes payable	(158)	(2,571)	2,867
Deferred revenue	13,332	(1,531)	1,012
Operating lease liabilities	(3,800)	(3,877)	(4,011)
Other long-term liabilities	(2,916)	(273)	(6,195)
Net cash provided by operating activities	33,836	19,024	44,093
Cash flows from investing activities:
Purchases of investments	(70,670)	(34,178)	(97,437)
Sales of investments	21,387	7,062	2,444
Maturities of investments	19,138	46,935	2,000
Purchase of tangible and intangible assets	(10,381)	(11,977)	(15,051)
Escrow claim associated with business acquisition	0	0	749
Net cash provided by (used in) investing activities	(40,526)	7,842	(107,295)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	13,525	10,536	10,585
Long-term financing payment for intangible assets	(7,127)	(6,030)	(4,887)
Net cash provided by financing activities	6,398	4,506	5,698
Net increase (decrease) in cash, cash equivalents and restricted cash	(292)	31,372	(57,504)
Cash, cash equivalents and restricted cash at beginning of period	144,921	113,549	171,053
Cash, cash equivalents and restricted cash at end of period	144,629	144,921	113,549
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1,418	7,112	1,444
Supplemental disclosure of noncash investing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 4,213	$ 6,880	$ 16,410