Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (13,294)	$ (13,900)
Adjustments to reconcile net loss to net cash flows from operating activities:
Amortization of right to use lease asset	35
Stock-based compensation expense	1,683	4,445
Issuance of common stock for services		12
Non-cash interest expense	87	336
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(356)	19
Accounts payable and accrued expenses	997	(1,091)
Net cash from operating activities	(10,848)	(10,179)
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash from investing activities
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock and warrants	50,469	15,379
Payment of preferred stock dividends	(394)	0
Net cash from financing activities	50,075	15,379
NET INCREASE IN CASH AND CASH EQUIVALENTS	39,227	5,200
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	8,253	3,053
CASH AND CASH EQUIVALENTS, END OF PERIOD	47,480	8,253
NONCASH FINANCING ACTIVITIES:
Payment of preferred stock dividends in common stock	$ 102	$ 915