Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (10,850)	$ (13,853)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation and amortization		1
Stock-based compensation expense	3,293	829
Issuance of common stock for services	11	27
Non-cash interest expense	256
Changes in operating assets and liabilities:
Prepaid expenses and other assets	372	379
Accounts payable and accrued expenses	(1,254)	629
Net cash flows from operating activities	(8,172)	(11,988)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock and warrants	15,255	3,584
Net cash flows from financing activities	15,255	3,584
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	7,083	(8,404)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3,053	15,362
CASH AND CASH EQUIVALENTS, END OF PERIOD	10,136	6,958
NONCASH FINANCING ACTIVITIES:
Payment of preferred stock dividends in common stock	$ 915	$ 894