Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (22,406,000)	$ (25,537,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	237,000	181,000
Debt related charges included in interest expense	113,000
Net amortization of premiums and discounts on marketable securities		(44,000)
Stock-based compensation	661,000	309,000
Change in fair value of derivative liability	(65,000)
Changes in operating assets and liabilities:
Accounts receivable	455,000	(449,000)
Prepaid expenses and other current assets	(366,000)	418,000
Accounts payable	(202,000)	21,000
Accrued expenses	(692,000)	189,000
Net cash used in operating activities	(22,265,000)	(24,912,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Sales of marketable securities		14,150,000
Purchase of property and equipment	(291,000)	(77,000)
Net cash (used in) provided by investing activities	(291,000)	14,073,000
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from private offering of common stock	11,475,000	13,800,000
Proceeds from issuance of common stock	17,000,000
Proceeds from issuance of convertible debt, net of discount	8,000,000
Redemption of convertible debt	(108,000)
Payments of convertible debt issuance costs	(50,000)
Proceeds from long-term debt	1,134,000
Payments of common stock issuance costs	(598,000)
Proceeds from exercise of stock options	19,000
Net cash provided by financing activities	36,872,000	13,800,000
NET INCREASE IN CASH AND CASH EQUIVALENTS	14,316,000	2,961,000
CASH AND CASH EQUIVALENTS–Beginning of period	2,776,000	5,618,000
CASH AND CASH EQUIVALENTS–End of period	17,092,000	$ 8,579,000
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Purchase of property and equipment in accounts payable	(161,000)
Offering costs in accounts payable	100,000
Offering costs in accrued expenses	$ 15,000