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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Cash flows from operating activities:    
Net loss $ (59,430) $ (96,892)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 19,898 19,234
Amortization (accretion) of premium (discount) on marketable debt securities, net (158) (491)
Stock-based compensation 77,059 80,495
Deferred income taxes (106) (28)
Other non-cash items, net (156) 290
Changes in operating assets and liabilities:    
Accounts receivable (12,460) (9,017)
Inventories (4,777) (7,373)
Prepaid expenses and other current assets 48 (293)
Other non-current assets 194 120
Accounts payable 16,001 (3,282)
Accrued and other current liabilities 13,821 25,332
Income taxes payable 507 (703)
Deferred revenue 6,432 3,740
Operating lease liabilities (2,409) (2,937)
Other long-term liabilities 157 211
Net cash provided by operating activities 54,621 8,406
Cash flows from investing activities:    
Purchase of investments (53,158) (57,343)
Sales of investments 15,074 17,866
Maturities of investments 23,571 15,613
Purchase of tangible and intangible assets (11,590) (6,196)
Net cash used in investing activities (26,103) (30,060)
Cash flows from financing activities:    
Stock repurchase (1,000) 0
Proceeds from exercise of stock options and employee stock purchase plan 8,295 9,657
Long-term financing payment for intangible assets (5,943) (5,795)
Net cash provided by financing activities 1,352 3,862
Net increase (decrease) in cash, cash equivalents and restricted cash 29,870 (17,792)
Cash, cash equivalents and restricted cash at beginning of period 144,629 144,921
Cash, cash equivalents and restricted cash at end of period 174,499 127,129
Supplemental disclosure of cash flow information:    
Cash paid for income taxes 1,323 2,236
Supplemental disclosure of noncash investing activities:    
Unpaid liabilities related to tangible and intangible assets purchases $ 1,651 $ 763