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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities:    
Net loss $ (21,397) $ (11,716)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 83 93
Equity-based compensation 3,572 5,183
Amortization of right-of-use assets 152  
Amortization of debt issuance costs   31
Amortization of debt discount   352
Change in the fair value of the derivative liability   (2,209)
Change in the fair value of the Simple Agreements for Future Equity   2,236
Gain on debt extinguishment   (443)
Changes in operating assets and liabilities:    
Grant receivables (1,873) (1,235)
Prepaid expenses and other assets 430 21
Other receivables 467 121
Other assets (1,732)  
Accounts payable (1,092) 2,165
Accrued expenses 343 1,269
Deferred grant income, current and other liabilities 2,635 501
Operating lease liabilities (121)  
Net cash used in operating activities (18,533) (3,631)
Cash flows from investing activities:    
Payments for property and equipment (171) (27)
Net cash used in investing activities (171) (27)
Cash flows from financing activities:    
Proceeds from the exercise of common stock options 1,618 276
Payments on loan payable (1,396) (268)
Proceeds from issuance of Simple Agreements for Future Equity   8,942
Proceeds from exercise of stock warrants   34
Net cash provided by financing activities 5,546 53,201
Effect of exchange rate changes on cash and cash equivalents (1) (11)
Net (decrease) increase in cash and cash equivalents (13,159) 49,532
Cash and cash equivalents    
Cash and cash equivalents-beginning of period 54,721 5,189
Cash and cash equivalents-end of period 41,562 54,721
Supplemental disclosures of non-cash financing activities:    
Prepayment of insurance through third-party financing 838 1,191
Remeasurement of right-of-use asset and operating lease liability 349  
Deferred offering costs included in Accounts payable 140  
Conversion of convertible preferred stock into common stock in initial public offering   84,761
Conversion of Simple Agreements for Future Equity into common stock in initial public offering   11,178
IPO    
Cash flows from financing activities:    
Proceeds from issuance of common stock   $ 44,217
Follow-on Public Offering    
Cash flows from financing activities:    
Proceeds from issuance of common stock $ 5,324