Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Accounts Receivable

	December 31,
	2019		2018
	(in thousands)
Accounts receivable	$	67,752	$	54,342
Less:  Allowance for doubtful accounts	(353)		(264)
Total, net	$	67,399	$	54,078

Accounts Receivable (Allowance)

	Years Ended December 31,
	2019		2018		2017
Allowance for doubtful accounts:	(in thousands)
Balance, beginning of period	$	264	$	119	$	90
Provisions for losses on accounts receivable, net of adjustments	91		174		179
Accounts receivable written off, net of recoveries	(2)		(29)		(150)
Balance, end of period	$	353	$	264	$	119