Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities:
Net loss	$ (9,005)	$ (7,984)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	305	251
Subsidiary stock issued to vendor	0	178
Depreciation	74	169
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	285	724
Right of use asset	123	103
Accounts payable	368	(1,324)
Accrued expenses	85	(788)
Accrued employee benefits	(147)	(182)
Operating lease liability	(168)	(183)
Net Cash Used in Operating Activities	(8,080)	(9,036)
Cash Flows from Investing Activities
Purchases of property and equipment	(14)	(4)
Net Cash Used in Investing Activities	(14)	(4)
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	65,908	(9,040)
Cash and cash equivalents at the beginning of the period	6,227	15,045
Cash and cash equivalents at the end of the period	72,135	6,005
Noncash Financing Activities:
Effect of Series A Preferred Stock price adjustment	7,402	0
Right of use asset from operating lease	1,270	0
Conversion of Series B Preferred Stock	2,477	2,177
Deemed dividends for accretion of Series B Preferred Stock discount	1,496	1,315
In-kind dividends paid in preferred stock	$ 24	$ 189