Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (6,501,000)	$ (8,828,000)	$ (13,650,000)	$ (17,895,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	87,000	57,000	162,000	117,000
Net amortization of premiums and discounts on marketable securities				(45,000)
Stock-based compensation			570,000	173,000
Changes in operating assets and liabilities:
Accounts receivable			677,000	(232,000)
Prepaid expenses and other current assets			(1,275,000)	645,000
Accounts payable			2,055,000	3,126,000
Accrued expenses			(1,497,000)	(311,000)
Net cash used in operating activities			(12,958,000)	(14,422,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Sales of marketable securities				14,150,000
Purchase of property and equipment			(254,000)	(67,000)
Net cash (used in) provided by investing activities			(254,000)	14,083,000
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from private offering of common stock			7,475,000
Proceeds from issuance of common stock			2,349,000
Proceeds from long-term debt			1,134,000
Proceeds from exercise of stock options			4,000
Net cash provided by financing activities			10,962,000
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS			(2,250,000)	(339,000)
CASH AND CASH EQUIVALENTS–Beginning of period			2,776,000	5,618,000
CASH AND CASH EQUIVALENTS–End of period	$ 526,000	$ 5,279,000	526,000	$ 5,279,000
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Purchase of property and equipment in accounts payable			(161,000)
Amortization of deferred offering costs in prepaid assets			(54,000)
Deferred offering costs in prepaid assets and accounts payable			$ 269,000