CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (20,641)	$ (19,545)
Adjustments to reconcile net loss to net cash flows from operating activities:
Stock-based compensation expense	1,178	1,505
Amortization of right to use lease asset	16	17
Non-cash interest expense	313	158
Change in fair value of derivative liabilities	279	(504)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	458	454
Accounts payable, accrued expenses and other liabilities	(3,027)	2,147
Accrued interest on convertible debt - related party	798	298
Net cash from operating activities	(20,626)	(15,470)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from convertible line of credit - related party	20,000	0
Net cash flows from financing activities	20,000	0
NET DECREASE IN CASH AND CASH EQUIVALENTS	(626)	(15,470)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	18,592	39,648
CASH AND CASH EQUIVALENTS, END OF PERIOD	17,966	24,178
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	477	0
Noncash right to use lease asset	$ 0	$ 111