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Stockholders' Equity - Summary of Warrant Activity (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Warrants outstanding [Roll Forward] |  |  |
Outstanding, beginning of period (in shares) | 93,835 | 20 |
Warrants issued (in shares) | 1,826,579 | 100,352 |
Warrants exercised (in shares) | (11,285) | (6,536) |
Warrants expired (in shares) |  | (1) |
Warrants exchanged (in shares) | (82,521) |  |
Outstanding, end of period (in shares) | 1,826,608 | 93,835 | 20
Warrants, Weighted Average Exercise Price [Roll Forward] |  |  |
Outstanding, beginning of period (in dollars per share) | $ 151 | $ 4,868,205,366 |
Warrants issued (in dollars per share) | 42 | 222 |
Warrants exercised (in dollars per share) | 7 | 1,252 |
Warrants expired (in dollars per share) |  | 13,798,400,000 |
Warrants exchanged (in dollars per share) | 170 |  |
Outstanding, end of period (in dollars per share) | $ 23 | $ 151 | $ 4,868,205,366
Weighted average remaining life | 4 years 11 months 26 days | 5 years 9 months | 4 years 10 months 17 days
Minimum [Member] |  |  |
Warrants, Exercise Price per Share [Roll Forward] |  |  |
Outstanding, (in dollars per share) | $ 7 | $ 7 | $ 857,500
Maximum [Member] |  |  |
Warrants, Exercise Price per Share [Roll Forward] |  |  |
Outstanding, (in dollars per share) | $ 23 | $ 7,000 | $ 13,798,400,000

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