Accounts Receivable and Contract Assets, Net

12 Months Ended

Dec. 31, 2021

(3) Accounts Receivable and Contract Assets, Net

Accounts receivable, net is as follows (in thousands):

	As of December 31,
	2021			2020
Accounts receivable amortized cost	$	127,917		$	98,164
Allowance for credit losses		(6,922	)		(3,788	)
Net accounts receivable	$	120,995		$	94,376

The following table summarizes the changes in the allowance for credit losses for accounts receivable (in thousands):

	Year Ended December 31,
	2021			2020			2019
Balance, beginning of period	$	(3,788	)	$	(1,125	)	$	(711	)
Provision for expected credit losses		(3,512	)		(2,877	)		(971	)
Write-offs, net		378			214			557
Balance, end of period	$	(6,922	)	$	(3,788	)	$	(1,125	)

Contract assets, net, included in deferred costs and other current assets on the consolidated balance sheets, is as follows (in thousands):

	As of December 31,
	2021			2020
Contract asset amortized cost	$	8,569		$	2,560
Allowance for credit losses		(1,160	)		(398	)
Net contract asset	$	7,409		$	2,162

The following table summarizes the changes in the allowance for credit losses for contract assets (in thousands):

	Year Ended December 31,
	2021			2020
Balance, beginning of period	$	(398	)	$	—
Provision for expected credit losses		(798	)		(398	)
Write-offs		36			—
Balance, end of period	$	(1,160	)	$	(398	)

Credit loss expense for the years ended December 31, 2021, 2020 and 2019 was $4.4 million, $2.7 million and $0.7 million, respectively.

The following table summarizes the changes in the sales reserve (in thousands):