Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (17,749,000)	$ (22,406,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	128,000	237,000
Debt related charges included in interest expense	458,000	113,000
Stock-based compensation	388,000	661,000
Change in fair value of derivative liability		(65,000)
Changes in operating assets and liabilities:
Accounts receivable	107,000	455,000
Prepaid expenses and other current assets	(538,000)	(366,000)
Accounts payable	(2,220,000)	(202,000)
Accrued expenses	(729,000)	(692,000)
Net cash used in operating activities	(20,155,000)	(22,265,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(32,000)	(291,000)
Net cash used in investing activities	(32,000)	(291,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	32,848,000	17,000,000
Redemption of convertible debt	(8,531,000)	(108,000)
Payments of common stock issuance costs	(985,000)	(598,000)
Proceeds from private offering of common stock		11,475,000
Proceeds from long-term debt		1,134,000
Proceeds from exercise of stock options		19,000
Net cash provided by financing activities	23,332,000	36,872,000
Proceeds from issuance of convertible debt, net of discount		8,000,000
Payments of convertible debt issuance costs		(50,000)
NET INCREASE IN CASH AND CASH EQUIVALENTS	3,145,000	14,316,000
CASH AND CASH EQUIVALENTS–Beginning of period	10,596,000	2,776,000
CASH AND CASH EQUIVALENTS–End of period	13,741,000	17,092,000
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Capital expenditures incurred but not yet paid	$ 7,000	(161,000)
Offering costs in accrued expenses		15,000
Offering costs in accounts payable		$ 100,000