Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows From Operating Activities:
Net loss	$ (5,873,000)	$ (7,086,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	169,000	155,000
Subsidiary stock issued to vendor	36,000	62,000
Depreciation	116,000	122,000
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	484,000	(706,000)
Right of use asset	67,000	56,000
Accounts payable	(1,290,000)	490,000
Accrued expenses	(567,000)	627,000
Accrued employee benefits	(8,000)	(821,000)
Lease liability	(120,000)	(105,000)
Net Cash Used In Operating Activities	(6,986,000)	(7,206,000)
Cash Flows From Investing Activities:
Net Cash From Investing Activities	0	0
Cash Flows From Financing Activities:
Net Cash From Financing Activities	0	0
Net decrease in cash and cash equivalents	(6,986,000)	(7,206,000)
Cash and cash equivalents at beginning of period	15,045,000	28,918,000
Cash and cash equivalents at end of period	8,059,000	21,712,000
Noncash Financing Activities:
Deemed dividends for accretion of Series B Preferred Stock discount	796,000	515,000
In-kind dividends paid in preferred stock	125,000	122,000
Right of use asset from operating lease	0	538,000
Series B Preferred Stock [Member]
Noncash Financing Activities:
Conversion of Series B Preferred Stock	$ 1,317,000	$ 825,000