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STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Cash flows from operating activities: |  |
Net income (loss) | $ 31,869 | $ (569)
Adjustments to reconcile net income (loss) to net cash used in operating activities: |  |
Amortization of intangible assets | 146 | 146
Depreciation and amortization | 1,622 | 2,029
Impairment loss on machinery and equipment | 106 | 0
Accretion of discounts on short-term investments | (5,311) | (7,419)
Stock-based compensation expense | 7,668 | 8,558
Non-cash lease expense | 4,084 | 3,729
Changes in operating assets and liabilities |  |
Accounts receivable | 329 | 32,554
Prepaid expenses and other assets | 1,433 | 2,415
Accounts payable | (297) | (1,426)
Accrued liabilities and other long-term liabilities | (9,628) | (7,041)
Deferred revenue | (118,252) | (89,011)
Net cash used in operating activities | (86,231) | (56,035)
Cash flows from investing activities: |  |
Purchases of property and equipment | (310) | (840)
Purchases of short term investments | (155,490) | (424,834)
Maturities of short term investments | 255,500 | 275,000
Net cash provided by (used in) investing activities | 99,700 | (150,674)
Cash flows from financing activities: |  |
Proceeds from issuance of pre-funded warrants and warrants, net of issuance cost | 0 | 29,669
Proceeds from issuance of common stock, net of issuance cost | 6,909 |
Proceeds from employee stock purchase plan and exercise of stock options | 613 | 561
Net cash provided by financing activities | 7,522 | 30,230
Net increase (decrease) in cash, cash equivalents and restricted cash | 20,991 | (176,479)
Cash, cash equivalents and restricted cash, beginning of year | 18,088 | 194,567
Cash, cash equivalents and restricted cash, end of year | 39,079 | 18,088
Supplemental disclosures of noncash investing items: |  |
Purchases of property and equipment in accounts payable and accrued liabilities | $ 8 | $ 75

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