Revenues and Accounts Receivable (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2020

Dec. 31, 2019

Revenues And Accounts Receivable [Abstract]

Schedule of Contract Balances

The following table presents the Company’s contract balances:

	September 30, 2020		December 31, 2019
Contract assets	$	35,441	$	13,605
Contract liabilities		9,335		3,314

The following table presents the Company’s contract balances as of December 31, 2019 and 2018:

	2019		2018
Contract assets	$	13,605	$	10,112
Contract liabilities		3,314		2,395

Schedule of Accounts Receivable, Net

Accounts Receivable, Net—Accounts receivable, net as of September 30, 2020 and December 31, 2019 consisted of the following:

	September 30, 2020			December 31, 2019
Accounts receivable, invoiced	$	52,372		$	46,643
Accounts receivable, other		929			611
Allowance for doubtful accounts		(8,516	)		(1,327	)
Accounts receivable—net	$	44,785		$	45,927

Accounts Receivable, Net—Accounts receivable, net as of December 31, 2019 and 2018 consisted of the following:

	2019			2018
Accounts receivable, invoiced	$	46,643		$	38,786
Accounts receivable, other		611			135
Allowance for doubtful accounts		(1,327	)		(453	)
Accounts receivable—net	$	45,927		$	38,468

Schedule of Allowance for Doubtful Accounts

The allowance for doubtful accounts as of September 30, 2020 and December 31, 2019 consisted of the following:

	Beginning Balance		Bad Debt Expense		Charged to Allowance			Other(1)		Ending Balance
Nine months ended September 30, 2020	$	1,327	$	6,445	$	(294	)	$	1,038	$	8,516
Year ended December 31, 2019		453		1,246		(556	)		184		1,327

(1) This amount consists of additions to the allowance due to business acquisitions.

The allowance for doubtful accounts as of December 31, 2019 and 2018 consisted of the following:

	Beginning Balance		Bad Debt Expense		Charged to Allowance			Other(1)		Ending Balance
Year ended December 31, 2018	$	573			$	(624	)	$	504	$	453
Year ended December 31, 2019		453		1,246		(556	)		184		1,327

(1) This amount consists of additions to the allowance due to business acquisitions.