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Stockholders' Equity - Summary of Warrant Activity (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Equity [Abstract] |  |
Number of Shares, Warrants Outstanding, Beginning balance | 1,645,500 | 80,000
Number of Shares, Warrants Granted | 1,607,000 | 1,621,500
Number of Shares, Warrants Exercised | (201,900) | (56,000)
Number of Shares, Warrants Forfeited or Cancelled |  |
Number of Shares, Warrants Outstanding, Ending balance | 3,050,600 | 1,645,500
Weighted Average Exercise Price, Warrants outstanding, Beginning balance | $ 3.97 | $ 2.00
Weighted Average Exercise Price, Warrants Granted | 1.30 | 4.00
Weighted Average Exercise Price, Warrants Exercised | 1.19 | 2.00
Weighted Average Exercise Price, Warrants Forfeited or cancelled |  |
Weighted Average Exercise Price, Warrants outstanding, Ending balance | $ 2.75 | $ 3.97
Weighted Average Remaining Contractual Life (Years), Warrants outstanding, Beginning balance | 4 years 1 month 9 days | 2 years 9 months 14 days
Weighted Average Remaining Contractual Life (Years), Warrants Grants | 4 years 7 months 21 days | 4 years 1 month 24 days
Weighted Average Remaining Contractual Life (Years), Warrants outstanding, Ending balance | 3 years 10 months 10 days | 4 years 1 month 9 days

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- Definition Number of non-option equity instruments exercised by participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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