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Stockholders' Equity - Additional Information (Details) |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 05, 2021 $ / shares shares | Oct. 01, 2020 USD ($) item $ / shares shares | Jun. 24, 2019 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Oct. 31, 2019 shares
Class of Stock [Line Items] |  |  |  |  |  |
Common stock, shares authorized | shares |  |  |  | 100,000,000 | 100,000,000 |
Common stock, par value per share (in dollars per share) | $ / shares |  | $ 0.001 |  | $ 0.001 | $ 0.001 |
Stock Issued During Period, Shares, Issued for Services | shares |  |  | 562,500 |  |  |
Preferred stock, par value per share (in dollars per share) | $ / shares |  |  |  | $ 0.001 | $ 0.001 |
Preferred stock, shares authorized | shares |  |  | 4,312,500 | 2,500,000 | 2,500,000 |
Shares issued, price per share (in dollars per share) | $ / shares |  |  | $ 17.00 |  |  |
Proceeds from issuance of stock |  |  |  | $ 237,225,000 | $ 0 |
Common stock, par value per share (in dollars per share) | $ / shares |  | $ 0.001 |  | $ 0.001 | $ 0.001 |
Proceeds from issuance of common stock, net of issuance costs |  |  |  | $ 28,160,000 | $ 0 |
Dividends, paid-in-kind |  |  |  | 2,500,000 |  |
Deemed dividend |  | $ 39,500,000 |  |  |  |
Proceeds from public offering, net of offering costs |  |  | $ 68,800,000 | $ 0 | $ 68,811,000 |
Common stock, shares issued | shares |  |  |  | 39,837,058 | 37,339,787 | 15.0
Common stock issued upon conversion of notes | shares |  |  |  | 4,810,002 |  |
Warrants [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Common stock issued upon conversion of notes | shares |  |  |  | 18,800,000 |  |
Director [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Services | shares |  |  |  | 2,869 | 5,753 |
Stock Issued During Period, Value, Issued for Services |  |  |  | $ 82,700 | $ 91,000 |
Class A convertible preferred stock [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock, par value per share (in dollars per share) | $ / shares |  |  |  | $ 0.001 | $ 0.001 |
Preferred stock, shares authorized | shares |  |  |  | 800,000 | 800,000 |
Class B convertible preferred stock [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock, par value per share (in dollars per share) | $ / shares |  |  |  | $ 0.001 | $ 0.001 |
Preferred stock, shares authorized | shares |  |  |  | 585,000 | 585,000 |
Class C convertible preferred stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock, par value per share (in dollars per share) | $ / shares |  |  |  | $ 0.001 | $ 0.001 |
Preferred stock, shares authorized | shares |  |  |  | 250,000 | 250,000 |
Dividends, paid-in-kind |  |  |  | $ 300,000 |  |
Liquidation preference (in dollars per share) | $ / shares |  | $ 1,000 |  |  |  |
Conversion price (in dollars per share) | $ / shares |  | $ 38.6152 |  |  |  |
Conversion rate |  | 25.90 |  |  |  |
Shares to be issued upon conversion | shares |  | 6,474,135 |  |  |  |
Threshold trading days for conversion of preferred stock |  | 20 |  |  |  |
Threshold consecutive trading days for conversion of preferred stock |  | 30 |  |  |  |
Stock price trigger as a percentage of conversion price for conversion of preferred stock |  | 150.00% |  |  |  |
Dividend rate on shares not repurchased |  | 5.50% |  |  |  |
Number of member to the board of directors who can be elected by the preferred stock holders | item |  | 1 |  |  |  |
Percentage of stock to be held to exercise the right to nominate member of board of directors |  | 66.67% |  |  |  |
Class C convertible preferred stock | Prior to the 180-day anniversary of October 1, 2020 |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Number of shares to be redeemed | shares |  | 50,000 |  |  |  |
Redemption price (as a percent) |  | 125.00% |  |  |  |
Class C convertible preferred stock | At any time beginning five years after Closing Date (but prior to six years after the Closing Date) |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Redemption price (as a percent) |  | 105.00% |  |  |  |
Class C convertible preferred stock | At any time beginning six years after Closing Date |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Redemption price (as a percent) |  | 100.00% |  |  |  |
Private Placement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Proceeds from issuance of common stock, net of issuance costs |  | $ 25,000,000.0 |  |  |  |
Aggregate purchase price |  | 275,000,000.0 |  |  |  |
Reimbursement of transactional expenses |  | 1,000,000.0 |  |  |  |
Net proceeds from private placement |  | 265,400,000 |  |  |  |
Direct and incremental expenses |  | $ 8,600,000 |  |  |  |
Private Placement | Class C convertible preferred stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Shares issued (in shares) | shares |  | 250,000 |  |  |  |
Preferred stock, dividend rate (as a percent) |  | 4.00% |  |  |  |
Preferred stock, par value per share (in dollars per share) | $ / shares |  | $ 0.001 |  |  |  |
Shares issued, price per share (in dollars per share) | $ / shares |  | $ 1,000 |  |  |  |
Proceeds from issuance of stock |  | $ 250.0 |  |  |  |
Net proceeds from private placement |  | $ 28,200,000 |  |  |  |
Private Placement | Common Stock [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Shares issued (in shares) | shares |  | 675,536 |  |  |  |
Net proceeds from private placement |  | $ 237,200,000 |  |  |  |
Subsequent Event | Class C convertible preferred stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Shares issued (in shares) | shares | 50,000 |  |  |  |  |
Liquidation preference (in dollars per share) | $ / shares | $ 1,000 |  |  |  |  |
Subsequent Event | Class C convertible preferred stock | Prior to the 180-day anniversary of October 1, 2020 |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Number of shares to be redeemed | shares | 50,000 |  |  |  |  |
Subsequent Event | Common Stock [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Common stock, par value per share (in dollars per share) | $ / shares | $ 0.001 |  |  |  |  |
Common stock, par value per share (in dollars per share) | $ / shares | 0.001 |  |  |  |  |
Conversion price (in dollars per share) | $ / shares | $ 38.6152 |  |  |  |  |
Shares to be issued upon conversion | shares | 1,312,860 |  |  |  |  |

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