Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023
Cash flows from operating activities:
Net loss	$ (72,821)	$ (67,100)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	12,755	11,945
Amortization (accretion) of premium (discount) on marketable debt securities, net	(371)	(710)
Stock-based compensation	53,648	55,387
Deferred income taxes	71	(2,908)
Other non-cash items, net	509	1,036
Changes in operating assets and liabilities:
Accounts receivable	1,790	21,829
Inventories	(1,422)	5,716
Prepaid expenses and other current assets	176	66
Other non-current assets	141	57
Accounts payable	(9,060)	(6,878)
Accrued and other current liabilities	14,692	124
Income taxes payable	(732)	(1,654)
Deferred revenue	4,258	325
Operating lease liabilities	(1,987)	(1,993)
Other long-term liabilities	140	(55)
Net cash provided by operating activities	1,787	15,187
Cash flows from investing activities:
Purchase of investments	(8,261)	(34,178)
Sales of investments	9,239	2,593
Maturities of investments	8,475	31,310
Purchase of tangible and intangible assets	(3,696)	(7,694)
Net cash provided by (used in) investing activities	5,757	(7,969)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	5,950	5,179
Long-term financing payment for intangible assets	(4,483)	(3,423)
Net cash provided by financing activities	1,467	1,756
Net increase in cash, cash equivalents and restricted cash	9,011	8,974
Cash, cash equivalents and restricted cash at beginning of period	144,921	113,549
Cash, cash equivalents and restricted cash at end of period	153,932	122,523
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1,752	2,975
Supplemental disclosure of noncash investing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 333	$ 8,188