Accounts Receivable, Net

9 Months Ended

Sep. 30, 2019

Accounts Receivable Net [Abstract]

Accounts Receivable, Net

(3) Accounts Receivable, Net

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

	As of			As of
	September 30, 2019			December 31, 2018
Accounts receivable	$	52,980		$	41,818
Allowance for doubtful accounts		(1,156	)		(711	)
Net accounts receivable	$	51,824		$	41,107

Bad debt expense was $0.3 million and $0.1 million for the three months ended September 30, 2019 and 2018, respectively. Bad debt expense was $0.6 million and $0.1 million for the nine months ended September 30, 2019 and 2018, respectively.

The following table summarizes the changes in the allowance for doubtful accounts (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Balance, beginning of period	$	(1,051	)	$	(716	)	$	(711	)	$	(863	)
Additions		(253	)		(134	)		(642	)		(25	)
Write-offs		148			30			197			68
Balance, end of period	$	(1,156	)	$	(820	)	$	(1,156	)	$	(820	)

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Balance, beginning of period	$	(195	)	$	(209	)	$	(200	)	$	(100	)
Additions		—			—			—			(133	)
Write-offs		4			69			9			93
Balance, end of period	$	(191	)	$	(140	)	$	(191	)	$	(140	)