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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 2 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 27, 2021 | Nov. 16, 2020 | Mar. 03, 2021 | Feb. 28, 2021 | Jan. 26, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Oct. 10, 2018 | Sep. 11, 2017
Subsequent Event |  |  |  |  |  |  |  |  |
Preferred Stock, Convertible, Conversion Price, Decrease | $ 1.50 |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding |  |  |  |  |  | 29,249,925 | 16,806,430 |  |
Preferred Stock, Shares Outstanding |  |  |  |  |  | 3,973 | 7,638 |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  |  |  |  |  |  | 13,672,173 |
Warrants Outstanding |  |  |  |  |  | 17,999,999 |  |  |
Exercise Price |  | $ 1.38 |  |  |  |  |  |  |
Exercise Price 0.69 [Member] |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |
Exercise Price |  | $ 0.69 |  |  |  |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |
Preferred Stock Conversion Price Per Share |  |  |  |  |  |  |  |  | $ 0.54
Preferred Stock, Shares Outstanding |  |  |  |  |  | 0 |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |
Common stock issued upon conversion |  |  |  | 8,996,768 |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  | $ 63.8 |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  | 76,300,000 |  |  |  |  |  |
Proceeds from Warrant Exercises |  |  | $ 8.0 | $ 8.0 |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  |  | 11,655,747 |  |  |  |  |
Subsequent Event [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |
Maximum percentage | 9.99% |  |  |  | 4.99% |  |  |  |
Preferred Stock Conversion Price Per Share | $ 18.90 |  |  |  |  |  |  |  |
Preferred Stock, Convertible, Conversion Price, Decrease | $ 1.50 |  |  |  |  |  |  |  |
Common stock issued upon conversion |  |  |  | 9,000,000 |  |  |  |  |
Preferred Stock, Shares Outstanding |  |  |  | 120,000 |  |  |  |  |
Subsequent Event [Member] | B Riley Securities Inc [Member] |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  | 76,300,000 |  |  |  |  |  |
Subsequent Event [Member] | B Riley Securities Inc [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |
Effective Period For Change in Beneficial Ownership | 61 days |  |  |  |  |  |  |  |

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