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Summary of Significant Accounting Policies (Fair Value of Financial Instruments) (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016 | Sep. 02, 2016
--- | --- | --- | ---
Class of Warrant or Right [Line Items] |  |  |
Fair value of warrant | $ 11,466,162 | $ 6,727,409 |
Warrants |  |  |
Class of Warrant or Right [Line Items] |  |  |
Fair value of warrant | 11,500,000 |  | $ 5,800,000
Senior Secured Term Loan |  |  |
Class of Warrant or Right [Line Items] |  |  |
Loan outstanding | 71,000,000 |  |
Senior Secured Term Loan | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |
Class of Warrant or Right [Line Items] |  |  |
Loan outstanding | $ 74,100,000 |  |

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: 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(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: 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(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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