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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (20,063) $ (22,209)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization expense 1,651 1,535
Amortization of debt discount and financing costs 45
Stock-based compensation 2,108 2,957
Change in fair value of other liabilities and derivatives (2) (324)
Gain on sale of investment in Nova Cell (244)
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets (42) 1,801
Accounts payable (1,328) (628)
Accrued expenses and other current liabilities (1,993) (1,854)
Operating lease right of use liability (1,380) (1,017)
Net cash used in operating activities (21,293) (19,694)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of machinery and equipment (120) (16)
Cash disposed in sale of investment in Nova Cell (50)
Net cash used in investing activities (170) (16)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from public offerings 9,883 13,946
Proceeds from warrant inducement financing 4,136 2,140
Proceeds from registered direct offering 3,503
Proceeds from at the market offering 3,268 3,119
Proceeds from exercise of pre-funded warrants 5 2
Repayment of financing lease obligations (90) (82)
Repayment of principal on term notes payable (200) (300)
Repayment of principal on related party bridge loan payable (200)
Payment of financing costs (846) (1,554)
Repayment of principal on related party term notes payable (2,000)
Proceeds from issuance of noncontrolling interest in Nova Cell 2,000
Proceeds from issuance of convertible notes payable 3,000
Related party proceeds from issuance of loan payable 200
Proceeds from issuance of promissory note 600
Proceeds from issuance of common stock and warrants per subscription agreement 1,000
Proceeds from exercise of common stock warrants 4,803
Repayment of convertible note payable (1,500)
Payment of debt issuance costs (9)
Net cash provided by financing activities 17,459 27,365
Effect of exchange rate changes on cash 14 (13)
NET (DECREASE) INCREASE IN CASH AND RESTRICTED CASH (3,990) 7,642
CASH AND RESTRICTED CASH BALANCE:    
At beginning of the year 9,809 2,167
At end of the year 5,819 9,809
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION    
Cash paid for interest 1,265 140
Cash paid for income taxes 17 14
SUPPLEMENTAL SCHEDULE OF NONCASH FINANCING AND INVESTING ACTIVITIES    
Deemed dividend on warrants 5,673 1,671
Machinery and equipment acquired through financing leases 152
Financing fees included in accounts payable and accrued liabilities 27 (91)
Issuance of common stock per conversion of convertible note 3,071
Issuance of convertible note for legal settlement 1,500
Issuance of common stock in lieu of cash for services 289
Related party issuance of common stock in lieu of cash for services 80
Issuance of common stock and warrants for legal settlement 308
Debt discount on Convertible Notes 109
Issuance of common stock in lieu of cash for SEPA commitment fee 81
Issuance of restricted stock units for liability settlement $ 133