Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities:
Net loss	$ (7,984)	$ (12,236)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	251	246
Subsidiary stock issued to vendor	178	104
Depreciation	169	182
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	724	(600)
Right of use asset	103	86
Accounts payable	(1,324)	1,419
Accrued expenses	(788)	1,403
Accrued employee benefits	(182)	(713)
Lease liability	(183)	(159)
Net Cash Used In Operating Activities	(9,036)	(10,268)
Cash Flows From Investing Activities:
Purchases of property and equipment	(4)	0
Net Cash Used In Investing Activities	(4)	0
Cash Flows From Financing Activities:
Net Cash From Financing Activities	0	0
Net decrease in cash and cash equivalents	(9,040)	(10,268)
Cash and cash equivalents at beginning of period	15,045	28,918
Cash and cash equivalents at end of period	6,005	18,650
Noncash Financing Activities:
Deemed dividends for accretion of Series B Preferred Stock discount	1,315	585
In-kind dividends paid in preferred stock	189	185
Right of use asset from operating lease	0	538
Series B Preferred Stock [Member]
Noncash Financing Activities:
Conversion of Series B Preferred Stock	$ 2,177	$ 938