Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows From Operating Activities:
Net loss	$ (2,990,000)	$ (3,528,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	83,000	64,000
Subsidiary stock issues to vendor	26,000	16,000
Depreciation	58,000	62,000
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	297,000	(267,000)
Right of use asset	33,000	28,000
Accounts payable	(1,068,000)	(267,000)
Accrued expenses	(714,000)	711,000
Accrued employee benefits	(626,000)	(991,000)
Lease liability	(59,000)	(52,000)
Net Cash Used In Operating Activities	(4,960,000)	(4,224,000)
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	(4,960,000)	(4,224,000)
Cash and cash equivalents at beginning of period	15,045,000	28,918,000
Cash and cash equivalents at end of period	10,085,000	24,694,000
Noncash Financing Activities:
Right of use asset from operating lease	0	538,000
Deemed dividends for accretion of Series B Preferred Stock discount	404,000	398,000
In-kind dividends paid in preferred stock	62,000	61,000
Series B Preferred Stock [Member]
Noncash Financing Activities:
Conversion of Series B Preferred Stock	$ 669,000	$ 638,000