Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Accounts Receivable

	December 31,
	2020		2019
	(in thousands)
Accounts receivable	$	47,893	$	67,752
Less:  Allowance for credit losses	(506)		(353)
Total, net	$	47,387	$	67,399

Accounts Receivable (Allowance)

	Years Ended December 31,
	2020		2019		2018
Allowance for credit losses:	(in thousands)
Balance, beginning of period	$	353	$	264	$	119
Provisions (recoveries) for expected credit losses, net of adjustments	153		91		174
Accounts receivable written off, net of recoveries	—		(2)		(29)
Balance, end of period	$	506	$	353	$	264