Property and Equipment net - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Capitalized cost related to the legal and architect costs			$ 0		$ 2,700
Impairment loss	$ 200
Impairment loss for capitalized architect costs	2,700
impairment loss for remaining building	300
Asset retirement cost associated with the remaining building	200
Operating expense
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 25,170	$ 65,862	$ 90,962	$ 102,991