Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Cash flows from operating activities:
Net loss	$ (75,865)	$ (117,126)	$ (169,417)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	25,592	26,060	24,813
Amortization (accretion) of premium (discount) on marketable debt securities, net	(165)	(582)	(1,154)
Stock-based compensation	98,040	107,803	111,316
Deferred income taxes	(78)	(119)	19,042
Other non-cash items, net	125	502	1,121
Changes in operating assets and liabilities:
Accounts receivable	(9,413)	(4,817)	27,037
Inventories	(17,897)	(5,213)	11,443
Prepaid expenses and other current assets	103	143	(961)
Other non-current assets	336	(75)	38
Accounts payable	33,687	(9,581)	10,658
Accrued and other current liabilities	12,996	30,383	(6,660)
Income taxes payable	148	(158)	(2,571)
Deferred revenue	8,167	13,332	(1,531)
Operating lease liabilities	(2,220)	(3,800)	(3,877)
Other long-term liabilities	(37)	(2,916)	(273)
Net cash provided by operating activities	73,519	33,836	19,024
Cash flows from investing activities:
Purchases of investments	(62,557)	(70,670)	(34,178)
Sales of investments	18,675	21,387	7,062
Maturities of investments	28,902	19,138	46,935
Purchase of tangible and intangible assets	(15,514)	(10,381)	(11,977)
Net cash provided by (used in) investing activities	(30,494)	(40,526)	7,842
Cash flows from financing activities:
Stock repurchase	(1,000)	0	0
Proceeds from exercise of stock options and employee stock purchase plan	10,963	13,525	10,536
Long-term financing payment for intangible assets	(6,156)	(7,127)	(6,030)
Net cash provided by financing activities	3,807	6,398	4,506
Net increase (decrease) in cash, cash equivalents and restricted cash	46,832	(292)	31,372
Cash, cash equivalents and restricted cash at beginning of period	144,629	144,921	113,549
Cash, cash equivalents and restricted cash at end of period	191,461	144,629	144,921
Supplemental disclosure of cash flow information:
Cash paid for income taxes	2,268	1,418	7,112
Supplemental disclosure of noncash investing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 23,716	$ 4,213	$ 6,880