CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (38,776)	$ (30,527)
Adjustments to reconcile net loss to net cash flows from operating activities:
Amortization of right to use asset	32	41
Stock-based compensation expense	2,867	2,076
Non-cash interest expense	410	283
Change in fair value of derivative	(557)	(138)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	101	65
Accrued interest on convertible notes payable and convertible line of credit - related party	623	206
Accounts payable, accrued expenses and other liabilities	4,244	3,686
Net cash flows from operating activities	(31,056)	(24,308)
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	10,000	0
Net proceeds from convertible note payable - related party	0	30,000
Net proceeds from issuance of common stock	0	6,814
Net cash flows from financing activities	10,000	36,814
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(21,056)	12,506
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	39,648	27,142
CASH AND CASH EQUIVALENTS, END OF PERIOD	18,592	39,648
NONCASH FINANCING ACTIVITIES:
Payment of preferred stock dividends in common stock	97	171
Fair value of derivative related to related party convertible note payable	0	1,268
Reclassification of accrued bonus to additional paid in capital	200	60
Noncash right to use lease asset	111	0
Common stock purchase warrants issued in connection with related party line of credit	$ 899	$ 0