Stockholders' Deficit - Share-based Payment Award Plans - Additional Information (Details) $ / shares in Units, $ in Millions	1 Months Ended				12 Months Ended
	Oct. 31, 2021 shares	Sep. 30, 2021 Employee Installment $ / shares shares	Aug. 31, 2021 shares	Jun. 30, 2020 shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares	May 31, 2021 shares	Jun. 30, 2019 shares
Class Of Stock [Line Items]
Number of shares outstanding					42,925,277
Exercise price per share | $ / shares		$ 5.01
Eligible Employees who elected to exchange Eligible Options | Employee		69
Options granted to purchase an aggregate shares of common stock		4,493,000
Percentage of shares of common stock underlying eligible options		91.50%
Number of annual installments vest | Installment		3
Common Stock, Shares, Issued					429,886,000	299,765,000
Share-based payment arrangement, expense | $					$ 18.1	$ 10.7	$ 10.7
Total unrecognized share based compensation | $					$ 16.2
Share-based compensation over a weighted average period					2 years 1 month 6 days
Restricted Stock Units [Member]
Class Of Stock [Line Items]
Share based compensation arrangement by share based payment award, grants in period in exchange for cancellation of tendered eligible options		700,264
Performance Shares Unit [Member]
Class Of Stock [Line Items]
Number of shares outstanding					39,440,678
Options [Member]
Class Of Stock [Line Items]
Weighted average grant date fair value | $ / shares					$ 0.77	$ 1.58	$ 3.10
Expected term					6 years 10 months 24 days
Volatility rate					67.60%
Volatility rate, minimum						63.50%	61.30%
Volatility rate, maximum						67.90%	64.58%
Dividend yields					0.00%	0.00%	0.00%
Risk-free interest rate					1.10%
Risk-free interest rate, minimum						0.30%	1.60%
Risk-free interest rate, maximum						1.70%	2.50%
Options [Member] | Minimum [Member]
Class Of Stock [Line Items]
Expected term						6 years	5 years 6 months
Options [Member] | Maximum [Member]
Class Of Stock [Line Items]
Expected term						6 years 9 months 18 days	6 years 6 months
2019 Stock Incentive Plan [Member]
Class Of Stock [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized					37,475,000
Additional authorized shares added in 2021								22,475,000
Number of shares common stock available									0
Award expiration period					10 years
2021 Inducement Grants [Member] | Restricted Stock Units [Member] | Time-Based Units [Member]
Class Of Stock [Line Items]
Share-based compensation arrangement by share-based payment award, grants in period	660,000		2,750,000
2021 Inducement Grants [Member] | Performance Shares Unit [Member] | Performance Units [Member]
Class Of Stock [Line Items]
Share-based compensation arrangement by share-based payment award, grants in period	260,000		2,750,000
Employee Stock Purchase Plan [Member]
Class Of Stock [Line Items]
Number of shares common stock available				5,400,000
Common Stock, Shares, Issued					336,056
Eligible employees to purchase common stock price per share equal to percentage				85.00%
Sale of stock, price Per share | $ / shares					$ 0.69
Proceeds from stock plans | $					$ 0.2