Stock-based Compensation - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Percentage of employees can satisfied the service condition			33.33%
Minimum period of employees need to continued employment			3 years
Number of common stock available for issuance	10,500,000		10,500,000
Shares issued	500,000		500,000
Shares granted	0		300,000
Stock-based compensation expense	$ 1,000,000	$ 0	$ 4,000,000	$ 0