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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 30, 2024 | Apr. 30, 2023
Cash flows from operating activities: |  |
Net loss | $ (37,932) | $ (35,902)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Depreciation and amortization | 6,354 | 5,824
Amortization (accretion) of premium (discount) on marketable debt securities, net | (205) | (369)
Stock-based compensation | 26,036 | 27,265
Deferred income taxes | 119 | 846
Other non-cash items, net | 478 | 64
Changes in operating assets and liabilities: |  |
Accounts receivable | (3,349) | 22,162
Inventories | 928 | (737)
Prepaid expenses and other current assets | (702) | (810)
Other non-current assets | (13) | 106
Accounts payable | (12,037) | 7,780
Accrued and other current liabilities | 5,806 | (2,613)
Income taxes payable | (637) | (493)
Deferred revenue | 1,115 | (152)
Operating lease liabilities | (983) | (968)
Other long-term liabilities | 71 | 22
Net cash provided by (used in) operating activities | (14,951) | 22,025
Cash flows from investing activities: |  |
Purchase of investments | (6,653) | (19,790)
Sales of investments | 7,195 | 1,468
Maturities of investments | 2,725 | 12,410
Purchase of tangible and intangible assets | (1,132) | (2,298)
Net cash provided by (used in) investing activities | 2,135 | (8,210)
Cash flows from financing activities: |  |
Proceeds from exercise of stock options and employee stock purchase plan | 2,903 | 2,592
Long-term financing payment for intangible assets | (3,191) | (2,207)
Net cash provided by (used in) financing activities | (288) | 385
Net increase (decrease) in cash, cash equivalents and restricted cash | (13,104) | 14,200
Cash, cash equivalents and restricted cash at beginning of period | 144,921 | 113,549
Cash, cash equivalents and restricted cash at end of period | 131,817 | 127,749
Supplemental disclosure of cash flow information: |  |
Cash paid for income taxes | 1,084 | 1,251
Supplemental disclosure of noncash investing activities: |  |
Unpaid liabilities related to tangible and intangible assets purchases | $ 298 | $ 825

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