Subsequent Events - Series X Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 04, 2021	Jan. 28, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Events
Preferred stock, outstanding			0	0
Common Stock Issuable Upon Conversion			20,084,337	12,433,600
Subsequent Events
Subsequent Events
Percentage of beneficial ownership initially, after conversion		9.99%
Subsequent Events | Registration Rights Agreement
Subsequent Events
Period to prepare and file a resale registration statement with the SEC.		90 days
Period to cause the registration statement to be declared effective by the SEC		30 days
Period to cause the registration statement to be declared effective by the SEC after review		60 days
Subsequent Events | Series X Preferred Stock
Subsequent Events
Preferred stock, outstanding		88,882,000
Redemption price per share	$ 2.87
Payments on redemption of preferred stock	$ 247.0
Subsequent Events | Outstanding shares issued in merger
Subsequent Events
Preferred stock, outstanding		50,504,000
Common Stock Issuable Upon Conversion		50,504,000,000
Subsequent Events | Outstanding shares issued in February 2021 Financing
Subsequent Events
Preferred stock, outstanding		35,573,000
Common Stock Issuable Upon Conversion		35,573,000,000
Subsequent Events | Warrants assumed in merger
Subsequent Events
Preferred stock, outstanding		2,805,000
Common Stock Issuable Upon Conversion		2,805,000,000
Subsequent Events | Series X Common shares, As converted
Subsequent Events
Common Stock Issuable Upon Conversion		88,882,000,000
Subsequent Events | Minimum
Subsequent Events
Percentage of beneficial ownership thereafter, after conversion		4.99%
Subsequent Events | Maximum
Subsequent Events
Percentage of beneficial ownership thereafter, after conversion		19.99%