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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Cash flows from operating activities:    
Net loss $ (44,539) $ (21,668)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 139 84
Stock-based compensation 1,520 1,242
Amortization of right-of-use asset 1,499 1,039
Gain on lease termination (1,576)
Accrued interest expense 174 176
Paid-in-kind interest expense 1,261 113
Amortization of debt discount and debt issuance costs 5,259 303
Loss on extinguishment of debt 22,440
Change in fair value of convertible notes (1,017)
Change in fair value of bridge notes derivative liability 1,459
Change in fair value of warrant liabilities (414) (215)
Change in fair value of contingent consideration liability (66) (118)
Commitment shares issued to Lincoln Park Capital, LLC 249
Loss on shares sold to Lincoln Park Capital, LLC 11
Non-cash component of acquisition of Exacis in-process research and development 433
Loss on disposal of fixed assets 1
Loss on non-controlling investment 59
Changes in operating assets and liabilities:    
Other receivables (12) 527
Prepaid expenses and other current assets 1,319 (556)
Other non-current assets 2 1,014
Accounts payable and accrued expenses 183 (2,898)
Operating lease liability (1,707) 1,338
Due to related party (1,205) (1,750)
Deferred revenue (582) 582
Other liabilities 27 (374)
Net cash used in operating activities (15,836) (20,408)
Cash flows from investing activities:    
Purchase of property and equipment (369) (19)
Proceeds received from the sale of fixed assets 4
Net cash used in investing activities (365) (19)
Cash flows from financing activities:    
Proceeds received from bridge notes financing 3,887
Proceeds received from common stock and prefunded warrants offering 1,137
Fees paid related to the common stock and prefunded warrant offering (135)
Proceeds received from convertible notes financings 1,405 16,503
Fees paid related to convertible notes financings (34) (251)
Proceeds received under promissory note 1,500
Payment made on promissory note (1,500)
Proceeds from sale of common stock pursuant to stock purchase agreement with Lincoln Park Capital Fund, LLC 320
Dividends paid to Series A preferred stockholders (16)
Net cash provided by financing activities 6,260 16,556
Net decrease in cash and cash equivalents (9,941) (3,871)
Cash, cash equivalents and restricted cash at beginning of period 11,670 15,541
Total cash, cash equivalents and restricted cash at end of period 1,729 11,670
Cash paid during the period for:    
Interest 48 20
Income taxes 2 4
Supplemental disclosure of non-cash investing and financing activities:    
Exchange of warrants for common stock 10,945
Exchange of convertible notes for common stock 31,187
Conversion of bridge notes for common stock 9,278
Reclassification of warrants to liabilities 11,244
Note warrants issued 755 9,219
Unpaid fees incurred in connection with the convertible note financings 32 116
Paid in-kind interest added to convertible notes principal 1,447 113
Repricing of warrants in connection with the December 2023 financing 766
Adjustment to lease liability and ROU asset due to remeasurement 4,245 (1,620)
Stock issued to Series A preferred stockholders in lieu of cash dividend 16
Initial measurement of ROU assets 34,410
Initial measurement of lease liability 34,170
Accrual for purchase of property and equipment 323
Contingent consideration for Exacis asset acquisition 225
Issuance of common stock for Exacis asset acquisition 208
Reconciliation of cash, cash equivalents and restricted cash at end of period:    
Cash and cash equivalents 1,729 7,575
Restricted cash $ 4,095