Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Line Items]
Depreciation, Depletion and Amortization, Total	$ 245,000	$ 157,000	$ 72,000
Cash and Cash Equivalents, at Carrying Value	$ 17,116,000	$ 19,055,000	20,818,000	$ 17,525,000
Equity Method Investment, Ownership Percentage	88.50%	88.50%
Noncontrolling Interest, Ownership Percentage by Parent	11.50%	11.50%
Accrued Liabilities	$ 700,000	$ 2,200,000
Prepaid Expense	46,000	1,700,000
Preferred Stock Dividends, Income Statement Impact	$ 6,962,000	$ 0	$ 0
Warrant [Member]
Summary of Significant Accounting Policies [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	32,029,808	57,341,642	7,908,899
Options [Member]
Summary of Significant Accounting Policies [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	12,564,098	11,636,227	8,941,930
Money Market Accounts [Member]
Summary of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 98,000	$ 1,700,000