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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2026 USD ($) | Mar. 31, 2025 USD ($)
Cash flows from operating activities: |  |
Net loss | $ (8,623) | $ (9,418)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation | 274 | 229
Stock-based compensation expense | 647 | 945
Loss on disposal of property and equipment, net | 5 | 0
Change in fair value of warrant liabilities | 241 | (1,618)
Amortization of debt discount and issuance costs | 17 |
Other | 6 | 11
Changes in assets and liabilities: |  |
Accounts receivable, net | 1,463 | 626
Unbilled receivables | (738) | 412
Inventory | 763 | 1,193
Prepaid expenses and other current assets | (1,401) | (1,241)
Other long term assets | (69) | 128
Accounts payable | 504 | 600
Deferred grant funding | (457) | 413
Deferred revenue | 18 | (80)
Due to related parties | 6 | (7)
Accrued expenses and other current liabilities | (1,667) | (1,435)
Operating lease liabilities, net | 3 | (7)
Net cash used in operating activities | (9,008) | (9,249)
Cash flows from investing activities: |  |
Purchases of property and equipment | (242) | (472)
Net cash used in investing activities | (242) | (472)
Cash flows from financing activities: |  |
Proceeds from issuance of debt, net | 13,641 |
Proceeds from exercise of stock options | 42 | 33
Net cash provided by financing activities | 14,486 | 5,582
Net increase (decrease) in cash and cash equivalents and restricted cash | 5,236 | (4,139)
Cash, cash equivalents and restricted cash, beginning of period | 36,042 | 37,673
Cash, cash equivalents and restricted cash, end of period | 41,278 | 33,534
Reconciliation of cash, cash equivalents, and restricted cash reported in the balance sheets |  |
Cash and cash equivalents | 40,778 | 33,093
Restricted cash | 500 | 441
Total cash, cash equivalents and restricted cash | 41,278 | 33,534
Supplemental disclosure of noncash information: |  |
Issuance of warrants in connection with Loan Agreement, net | 495 |
Initial measurement of warrant liabilities |  | 2,858
Unpaid purchase of property and equipment | 28 | 509
Unpaid debt issuance and financing costs | 15 | 238
Class A Common Stock | At-the-market Offering Program |  |
Cash flows from financing activities: |  |
Gross proceeds from issuance of common stock | $ 803 | 129
Class A Common Stock | February 2025 Offering |  |
Cash flows from financing activities: |  |
Gross proceeds from issuance of common stock |  | $ 5,420

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