Accounts Receivable and Contract Assets, Net - Schedule of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts Receivable Net [Abstract]
Accounts receivable amortized cost	$ 83,524		$ 69,767
Allowance for credit losses	(2,597)	$ (2,257)	(1,125)	$ (1,156)	$ (1,051)	$ (711)
Net accounts receivable	$ 80,927		$ 68,642