Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows From Operating Activities:
Net loss	$ (3,528)	$ (2,326)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	64	676
Subsidiary stock issued to consultant	16	0
Warrant issued to consultant	0	9
Change in fair value of warrant liabilities	0	(2,655)
Depreciation and amortization	62	71
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(267)	221
Right of use asset	28	0
Accounts payable	(267)	(527)
Accrued expenses	711	(468)
Accrued employee benefits	(991)	(1,058)
Lease liability	(52)
Deferred rent	0	(22)
Net Cash Used In Operating Activities	(4,224)	(6,079)
Net Cash Used In Investing Activities	0	0
Net Cash Provided By Financing Activities	0	0
Net decrease in cash and cash equivalents	(4,224)	(6,079)
Cash and cash equivalents at beginning of period	28,918	17,116
Cash and cash equivalents at end of period	24,694	11,037
NONCASH FINANCING ACTIVITIES:
Right of use asset from operating lease	538	0
Deemed dividends for beneficial conversion feature	398	0
In-kind dividends paid in preferred stock	61	59
Series B Preferred Stock [Member]
NONCASH FINANCING ACTIVITIES:
Conversion of Series B Preferred Stock	$ 638	$ 0