Stockholders' Equity - Warrant Activity (Details) - USD ($) |
12 Months Ended | |
---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
Shares of Stock under Warrants | ||
Outstanding at January 1, 2019 (shares) | 4,062,507 | |
Granted (shares) | 32,023,503 | |
Exercised (shares) | (11,678,458) | |
Canceled (shares) | (1,502) | |
Outstanding at December 31, 2019 (shares) | 24,406,050 | 4,062,507 |
Weighted- Average Exercise Price | ||
Outstanding at January 1, 2019 (USD per share) | $ 6.32 | |
Granted (USD per share) | 0.07 | |
Exercised (USD per share) | 0.57 | |
Canceled (USD per share) | 59.90 | |
Outstanding at December 31, 2019 (USD per share) | $ 1.76 | $ 6.32 |
Weighted- Average Remaining Contractual Term | ||
Outstanding at January 1, 2019 | 4 years 9 months 25 days | 4 years 8 months 1 day |
Granted | 4 years 10 months 2 days | |
Outstanding at December 31, 2019 | 4 years 9 months 25 days | 4 years 8 months 1 day |
Aggregate Intrinsic Value | ||
Exercised | $ 10,457,345 | |
Outstanding at December 31, 2019 | $ 7,932,689 |