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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

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