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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Cash flows from operating activities: |  |
Net loss | $ (11,080) | $ (11,770)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation | 420 | 402
Non-cash lease expense | 122 | 108
Commitment share expense | (0) | 399
Change in fair value of common stock warrant liabilities | 1,309 | (0)
Change in fair value of Clene Nanomedicine contingent earn-out liability | (53) | 55
Change in fair value of Initial Stockholders contingent earn-out liability | (7) | 7
Stock-based compensation expense | 2,013 | 2,223
Accretion of debt discount | 367 | 250
Non-cash interest income on marketable securities | (81) | 0
Non-cash interest expense on notes payable | 91 | 82
Changes in operating assets and liabilities: |  |
Accounts receivable | 79 | 126
Inventory | 0 | (45)
Prepaid expenses and other current assets | (428) | (581)
Accounts payable | 141 | (2,406)
Accrued liabilities | 185 | 2,070
Operating lease obligations | (160) | (138)
Net cash used in operating activities | (7,082) | (9,218)
Cash flows from investing activities: |  |
Purchases of marketable securities | (6,168) | 0
Proceeds from maturities of marketable securities | 6,250 | 5,000
Purchases of property and equipment | (11) | (278)
Net cash provided by investing activities | 71 | 4,722
Cash flows from financing activities: |  |
Proceeds from issuance of common stock and warrants, net of offering costs | 0 | 4,266
Payments of finance lease obligations | (19) | (28)
Proceeds from the issuance of notes payable | 0 | 350
Net cash provided by (used in) financing activities | (19) | 4,588
Effect of foreign exchange rate changes on cash and restricted cash | (59) | 18
Net increase (decrease) in cash, cash equivalents and restricted cash | (7,089) | 110
Cash, cash equivalents and restricted cash – beginning of period | 28,879 | 18,390
Cash, cash equivalents and restricted cash – end of period | 21,790 | 18,500
Reconciliation of cash, cash equivalents and restricted cash to the consolidated balance sheets |  |
Cash and cash equivalents | 21,732 | 18,442
Restricted cash | 58 | 58
Cash, cash equivalents and restricted cash | 21,790 | 18,500
Supplemental cash flow information: |  |
Cash paid for interest expense | $ 784 | $ 982

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