Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (14,787)	$ (9,670)
Adjustments to reconcile net loss to net cash flows from operating activities:
Stock-based compensation expense	835	824
Amortization of right to use lease asset	20	17
Non-cash interest expense	107	43
Change in fair value of derivative	172	0
Changes in operating assets and liabilities:
Prepaid expenses and other assets	587	377
Accounts payable, accrued expenses and other liabilities	707	1,434
Net cash flows from operating activities	(12,359)	(6,975)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from convertible note payable - related party	10,000	0
Net proceeds from issuance of common stock	6,815	263
Net cash flows from financing activities	16,815	263
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	4,456	(6,712)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	27,142	47,480
CASH AND CASH EQUIVALENTS, END OF PERIOD	31,598	40,768
NONCASH FINANCING ACTIVITIES:
Payment of preferred stock dividends in common stock	67	60
Fair value of derivative related to related party convertible note payable	420	0
Reclassification of accrued bonus to additional paid in capital	$ 60	$ 0