Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Operating activities    
Net loss $ (3,708) $ (23,789)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 334 638
Gain on disposal of property and equipment (29)  
Non-cash lease expense   66
Stock-based compensation expense 2,103 2,645
Change in fair value of warrant liabilities (26,974) (8,865)
Net amortization of premiums and discounts on marketable securities (112) (527)
Amortization of debt-discount and accretion of deferred debt costs 152 135
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets 1,556 1,318
Unbilled receivable   (71)
Other long-term assets 42 701
Accounts payable (198) (3,616)
Accrued expenses (4,000) (4,217)
Deferred revenue   (1,085)
Operating lease liabilities (264) (234)
Net cash used in operating activities (31,098) (36,901)
Investing activities    
Purchases of property and equipment   (235)
Proceeds from the disposition of asset-held-for-sale 29  
Purchases of marketable securities (24,669) (48,500)
Maturities of marketable securities   22,987
Net cash used in investing activities (24,640) (25,748)
Financing activities    
Payments on financing lease obligations   (53)
Payment of issuance cost related to underwritten registered direct offering and at-the-market facility (265)  
Net cash used in financing activities (265) (53)
Net decrease in cash, cash equivalents and restricted cash (56,003) (62,702)
Cash, cash equivalents and restricted cash, Beginning of period 141,645 170,553
Cash, cash equivalents and restricted cash, End of period 85,642 107,851
Supplemental disclosure of cash flow information:    
Cash paid for interest 1,209 1,053
Non-cash investing and financing activities:    
Offering costs incurred but unpaid as of period end $ 74 $ 10