CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (11,527)	$ (9,932)
Adjustments to reconcile net loss to net cash flows from operating activities:
Stock-based compensation expense	662	858
Amortization of right to use asset	32	10
Non-cash interest expense	144	80
Change in fair value of derivative liabilities	769	(229)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	183	160
Accounts payable, accrued expenses and other liabilities	(1,372)	864
Accrued interest on convertible debt - related party	316	147
Net cash from operating activities	(10,793)	(8,042)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from convertible line of credit - related party	10,000	0
Net cash flows from financing activities	10,000	0
NET DECREASE IN CASH AND CASH EQUIVALENTS	(793)	(8,042)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	18,592	39,648
CASH AND CASH EQUIVALENTS, END OF PERIOD	17,999	31,606
NONCASH FINANCING ACTIVITIES:
Payment of preferred stock dividends in common stock	62	49
Reclassification of accrued bonus to additional paid in capital	210	200
Common stock purchase warrants issued in connection with related party line of credit	297	0
Noncash right to use lease asset	$ 0	$ 111