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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 |  |

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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