Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (22,380,000)	$ (28,851,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	169,000	307,000
Debt related charges included in interest expense	458,000	297,000
Stock-based compensation	541,000	732,000
Change in fair value of derivative liability		(65,000)
Gain on forgiveness of PPP loan	(876,000)
Changes in operating assets and liabilities:
Accounts receivable	157,000	741,000
Prepaid expenses and other current assets	(302,000)	(197,000)
Accounts payable	(2,108,000)	122,000
Accrued expenses	(957,000)	(1,733,000)
Net cash used in operating activities	(25,298,000)	(28,647,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(32,000)	(290,000)
Net cash used in investing activities	(32,000)	(290,000)
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)	(713,000)
Payments of long-term debt	(9,000)
Proceeds from private offering of common stock		11,475,000
Proceeds from issuance of convertible debt, net of discount		8,000,000
Payments of convertible debt issuance costs		(50,000)
Proceeds from long-term debt		1,134,000
Proceeds from exercise of stock options		19,000
Net cash provided by financing activities	23,323,000	36,757,000
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(2,007,000)	7,820,000
CASH AND CASH EQUIVALENTS–Beginning of period	10,596,000	2,776,000
CASH AND CASH EQUIVALENTS–End of period	8,589,000	10,596,000
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Purchase of property and equipment in prepaid assets	19,000
Forgiveness of PPP loan	$ 876,000
Purchase of property and equipment in accounts payable		$ (161,000)