Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022
Cash flows from operating activities:
Net loss	$ (108,810)	$ (54,281)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	18,402	14,426
Amortization (accretion) of premium (discount) on marketable debt securities, net	(957)	(281)
Stock-based compensation	82,796	82,051
Deferred income taxes	(3,676)	755
Other non-cash items, net	1,066	28
Changes in operating assets and liabilities:
Accounts receivable	29,019	(4,249)
Inventories	9,703	(176)
Prepaid expenses and other current assets	1,539	80
Other non-current assets	105	841
Accounts payable	(8,553)	(2,044)
Accrued and other current liabilities	6,938	2,813
Income taxes payable	(1,721)	2,537
Deferred revenue	171	(378)
Operating lease liabilities	(2,940)	(3,254)
Other long-term liabilities	(26)	135
Net cash provided by operating activities	23,056	39,003
Cash flows from investing activities:
Purchase of investments	(34,433)	(87,641)
Sales of investments	5,222	756
Maturities of investments	44,310	0
Purchase of tangible and intangible assets	(10,047)	(13,023)
Escrow claim associated with business acquisition	0	749
Net cash provided by (used in) investing activities	5,052	(99,159)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	6,912	6,834
Payment for intangible assets	(4,775)	(4,887)
Net cash provided by financing activities	2,137	1,947
Net increase (decrease) in cash, cash equivalents and restricted cash	30,245	(58,209)
Cash, cash equivalents and restricted cash at beginning of period	113,549	171,053
Cash, cash equivalents and restricted cash at end of period	143,794	112,844
Supplemental disclosure of cash flow information:
Cash paid for income taxes	5,499	1,340
Supplemental disclosure of noncash investing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 6,868	$ 1,239