Accounts Receivable, Net

9 Months Ended

Sep. 30, 2017

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, 2017			December 31, 2016
Accounts receivable	$	23,192		$	18,231
Allowance for doubtful accounts and sales reserve		(919	)		(419	)
Net accounts receivable	$	22,273		$	17,812

Bad debt expense and sales credits reserve were $0.2 million and $0.6 million for the three and nine months ended September 30, 2017, respectively, and $0.1 million and $0.1 million for the three and nine months ended September 30, 2016, 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,
	2017			2016			2017			2016
Balance, beginning of period	$	(610	)	$	(377	)	$	(374	)	$	(336	)
Additions		(195	)		(8	)		(484	)		(95	)
Write-offs		11			33			64			79
Balance, end of period	$	(794	)	$	(352	)	$	(794	)	$	(352	)

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Balance, beginning of period	$	(116	)	$	(45	)	$	(45	)	$	(45	)
Additions		(24	)		—			(104	)		—
Write-offs		15			—			24			—
Balance, end of period	$	(125	)	$	(45	)	$	(125	)	$	(45	)