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Common Stock - Private Placement of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 03, 2020 | Feb. 05, 2019 | Sep. 30, 2020 | Mar. 05, 2020 | Dec. 31, 2019 | Jan. 31, 2019
Private Placement of Common Stock |  |  |  |  |  |
Common stock issued |  | 7,557,142 |  |  |  |
Price per share (in dollars per share) |  | $ 1.75 |  |  |  |
Common Stock, Par or Stated Value Per Share |  |  | $ 0.001 |  | $ 0.001 |
January 2020 Private Placement |  |  |  |  |  |
Private Placement of Common Stock |  |  |  |  |  |
Exercise price of warrant |  |  | $ 1.055 | $ 2.11 |  | $ 1.75
Fixed cumulative percentage per annum |  |  | 8.00% |  |  |
Cumulative Dividends |  |  | $ 372 |  |  |
Series A Preferred | January 2020 Private Placement |  |  |  |  |  |
Private Placement of Common Stock |  |  |  |  |  |
Common stock issued | 1,421,801 |  |  |  |  |
Price per share (in dollars per share) | $ 10.54 |  |  |  |  |
Net proceeds from issuance of stock in private placement | $ 25,322 |  |  |  |  |
Convertible Preferred Stock, Shares Issued upon Conversion |  |  |  | 14,413,902 |  |
Common Stock, Par or Stated Value Per Share |  |  |  | $ 0.001 |  |
Value of beneficial conversion features | $ 5,226 |  |  |  |  |
Series B Preferred | January 2020 Private Placement |  |  |  |  |  |
Private Placement of Common Stock |  |  |  |  |  |
Common stock issued | 1,137,442 |  |  |  |  |
Price per share (in dollars per share) | $ 10.55 |  |  |  |  |
Convertible Preferred Stock, Shares Issued upon Conversion |  |  |  | 11,531,133 |  |
Common Stock, Par or Stated Value Per Share |  |  |  | $ 0.001 |  |
Value of beneficial conversion features | $ 4,173 |  |  |  |  |

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