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Stockholders' Equity - Summary of Warrant Activity (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Equity [Abstract] |  |
Number of Shares, Warrants Outstanding, Beginning balance | 305,060 | 164,550
Number of Shares, Warrants Granted | 65,690 | 160,700
Number of Shares, Warrants Exercised | (7,023) | (20,190)
Number of Shares, Warrants Forfeited or Cancelled |  |
Number of Shares, Warrants Outstanding, Ending balance | 363,727 | 305,060
Weighted Average Exercise Price, Warrants outstanding, Beginning balance | $ 27.50 | $ 39.70
Weighted Average Exercise Price, Warrants Granted | 15.60 | 13.00
Weighted Average Exercise Price, Warrants Exercised | 10.80 | 11.90
Weighted Average Exercise Price, Warrants Forfeited or cancelled |  |
Weighted Average Exercise Price, Warrants outstanding, Ending balance | $ 25.60 | $ 27.50
Weighted Average Remaining Contractual Life (Years), Warrants outstanding, Beginning balance | 3 years 10 months 10 days | 4 years 1 month 9 days
Weighted Average Remaining Contractual Life (Years), Warrants Grants | 4 years 4 months 20 days | 4 years 7 months 21 days
Weighted Average Remaining Contractual Life (Years), Warrants outstanding, Ending balance | 3 years 1 month 13 days | 3 years 10 months 10 days

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