Basis of Presentation - Canada Emergency Wage Subsidy Program of 2020 - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Canada Emergency Wage Subsidy Program of 2020
Recognition of reduction in compensation expense	$ 2,195,000	$ 4,345,000	$ 4,072,000	$ 4,345,000