Income Taxes (Details Narrative) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Federal operating loss carryforward	$ 5,700,000	$ 5,500,000
Deferred tax valuation allowance, percentage	100.00%
Deferred tax valuation allowance	$ 2,400,000	$ 2,400,000
Earliest Tax Year [Member]
Expiration date	Dec. 31, 2024
Tax credit expiration date	Dec. 31, 2022
Latest Tax Year [Member]
Expiration date	Dec. 31, 2037
Tax credit expiration date	Dec. 31, 2036
Federal [Member]
Operating loss carryforwards	$ 321,800,000
Tax credit research and development	16,000,000
Federal [Member] | Shareholders [Member]
Operating loss carryforwards	72,700,000
Federal [Member] | Earliest Tax Year [Member]
Operating loss carryforwards	249,100,000
State [Member]
Operating loss carryforwards	246,700,000
Tax credit research and development	22,000,000
State [Member] | Latest Tax Year [Member]
Operating loss carryforwards	$ 235,600,000