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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 $ (47,047) $ (41,066)
Adjustments to reconcile net loss to net cash from operating activities:    
Amortization of right to use asset 37 33
Stock-based compensation expense 2,447 2,261
Non-cash interest expense 1,100 697
Change in fair value of derivatives (588) 432
Changes in operating assets and liabilities:    
Prepaid expenses and other assets (82) (90)
Accrued interest on convertible notes payable and convertible line of credit - related party 4,440 2,097
Accounts payable, accrued expenses and other liabilities (2,074) 2,671
Net cash from operating activities (41,767) (32,965)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Net cash from investing activities 0 0
CASH FLOWS FROM FINANCING ACTIVITIES:    
Net proceeds from convertible line of credit - related party 30,000 30,000
Net proceeds from exercise of common stock options and warrants 1,227 10,033
Net cash from financing activities 31,227 40,033
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (10,540) 7,068
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 25,660 18,592
CASH AND CASH EQUIVALENTS, END OF PERIOD 15,120 25,660
NONCASH FINANCING ACTIVITIES:    
Payment of preferred stock dividends in common stock 91 120
Reclassification of accrued bonus to additional paid in capital 0 210
Common stock purchase warrants issued in connection with related party line of credit $ 845 $ 671