Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows From Operating Activities:
Net loss	$ (2,537)	$ (2,990)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	101	83
Subsidiary stock issuances to vendor	0	26
Depreciation	33	58
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(42)	297
Right of use asset	39	33
Accounts payable	(265)	(1,068)
Accrued expenses	(71)	(714)
Accrued employee benefits	(518)	(626)
Lease liability	(68)	(59)
Net Cash Used In Operating Activities	(3,328)	(4,960)
Cash Flows From Investing Activities:
Purchases of property and equipment	(14)	0
Net Cash Used In Investing Activities	(14)	0
Cash Flows From Financing Activities:
Proceeds from "at the market" stock issuance	65,960	0
Proceeds from issuance of common stock for warrant exercises	8,042	0
Net Cash Provided By Financing Activities	74,002	0
Net increase (decrease) in cash and cash equivalents	70,660	(4,960)
Cash and cash equivalents at the beginning of this period	6,227	15,045
Cash and cash equivalents at the end of this period	76,887	10,085
NONCASH FINANCING ACTIVITIES:
Effect of Series A Preferred Stock price adjustment	7,402	0
Conversion of Series B Preferred Stock	2,477	669
Deemed dividends for accretion of Series B Preferred Stock discount	1,497	404
In-kind dividends paid in preferred stock	$ 23	$ 62