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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Cash flows from operating activities: |  |  |
Net loss | $ (145,428) | $ (152,261) | $ (149,333)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation and amortization | 5,381 | 5,480 | 4,622
Impairment of inventories | 493 | 1,140 | 224
Loss on joint development agreement (2) | 3,785 | 0 | 0
Fair value at issuance of Series A warrants | 0 | 0 | 6,500
Change in fair value of warrant liabilities | 21,453 | 1,486 | 182
Stock-based compensation | 21,843 | 23,708 | 23,675
Amortization of right-of-use assets | 3,106 | 3,463 | 3,108
Amortization of premium and accretion of discount on available-for-sale securities, net | (1,050) | (3,537) | (2,973)
Other | 423 | 563 | 0
Changes in operating assets and liabilities: |  |  |
Accounts receivable, net | (2,537) | (559) | 2,259
Inventories | (3,936) | (1,111) | 353
Other current assets | (8,715) | (2,566) | 279
Other noncurrent assets | 288 | 318 | (270)
Accounts payable | (504) | 1,835 | (1,592)
Accrued liabilities | 3,314 | 2,334 | (6,415)
Accrued employee costs | 8,162 | (260) | 1,322
Lease liability | (2,818) | (3,595) | (3,097)
Other current liabilities | (18,337) | 16,649 | 2,330
Net cash used in operating activities | (115,077) | (106,913) | (118,826)
Cash flows from investing activities: |  |  |
Purchase of property, plant, and equipment (including advance) | (4,609) | (5,107) | (6,104)
Purchase of non-marketable equity investments | 0 | 0 | (5,000)
Purchase of available-for-sale securities | (75,014) | (79,980) | (152,364)
Proceeds from maturities of available-for-sale securities | 109,549 | 182,988 | 232,745
Net cash provided by investing activities | 29,926 | 97,901 | 69,277
Cash flows from financing activities: |  |  |
Proceeds from issuance of stock in private placement | 32,500 | 0 | 21,455
Transaction costs related to business combination and private offering | (400) |  |
Transaction costs related to issuance of stock in private placement |  | 0 | (818)
Proceeds from convertible notes | 100,000 | 0 | 0
Transaction costs related to convertible notes | (3,072) | 0 | 0
Payments of taxes withheld on net settled vesting of restricted stock units | (578) | (752) | (199)
Proceeds from exercise of stock options | 128 | 81 | 238
Net cash (used in) provided by financing activities | 128,578 | (671) | 20,676
Net increase (decrease) in cash and cash equivalents | 43,427 | (9,683) | (28,873)
Beginning cash and cash equivalents | 28,864 | 38,547 | 67,420
Ending cash and cash equivalents | 72,291 | 28,864 | 38,547
Supplemental disclosures of cash flow information: |  |  |
Cash paid for interest | 0 | 0 | 0
Cash paid for income taxes | 174 | 165 | 0
Supplemental disclosure of noncash investing and financing activities: |  |  |
Unpaid property, plant and equipment purchases | 727 | 835 | 90
Joint development contract assets | 7,500 | 0 | 0
Convertible debt issuance cost included in accounts payable | 297 | 0 | 0
Right-of-use asset obtained in exchange for lease liability | $ 4,760 | $ 0 | $ 2,995

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