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Warrants and Derivative Liabilities (Details 5) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 16, 2018 | Jan. 19, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Derivative Liabilities Line Items |  |  |  |  |  |
Initial Fair Value of Emerald Financing Warrant Liability |  |  | $ 516,058 | $ 10,784,634 | $ 10,988,736 | $ 368,364
Less: Proceeds from Emerald Financing |  |  |  | (3,240,878) |  |
Emerald Financing - Warrant Liability |  |  |  |  |  |
Derivative Liabilities Line Items |  |  |  |  |  |
Initial Fair Value of Emerald Financing Warrant Liability | $ 5,707,423 | $ 4,717,211 | $ 0 | 10,424,634 | 10,424,634 |
Less: Proceeds from Emerald Financing | 1,750,000 | 1,500,000 |  |  | 3,250,000 |
Excess over proceeds adjustment | $ 3,957,423 | $ 3,217,211 |  | $ 7,174,634 | $ 7,174,634 |

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- Definition The fair value of warrants issued in noncash investing or financing activities. + References No definition available. + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Details
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