Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of Significant Accounting Policies [Line Items]
Depreciation, Depletion and Amortization, Total	$ 157,000	$ 72,000	$ 20,000
Goodwill, Impairment Loss	0	0	0
Cash and Cash Equivalents, at Carrying Value	$ 19,055,000	20,818,000	$ 17,525,000	$ 14,625,000
Equity Method Investment, Ownership Percentage	88.50%
Noncontrolling Interest, Ownership Percentage by Parent	11.50%
Accrued Liabilities	$ 1,100,000	2,200,000
Prepaid Expense	$ 1,700,000	$ 8,300,000
Warrant [Member]
Summary of Significant Accounting Policies [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	57,341,642	7,908,899	7,974,794
Options [Member]
Summary of Significant Accounting Policies [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	11,636,227	8,941,930	5,981,106
Money Market Accounts [Member]
Summary of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 1,700,000	$ 5,300,000