Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2021

Receivables [Abstract]

Accounts Receivable

	September 30, 2021		December 31, 2020
	(in thousands)
Accounts receivable	$	59,233	$	47,893
Less:  Allowance for credit losses	(477)		(506)
Total, net	$	58,756	$	47,387

Allowance for Doubtful Accounts

	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
Allowance for credit losses:	(in thousands)
Balance, beginning of period	$	518	$	429	$	506	$	353
Provisions (recoveries) for expected credit	(12)		117		—		193
losses, net of adjustments
Accounts receivable written off, net of recoveries	(29)		—		(29)		—
Balance, end of period	$	477	$	546	$	477	$	546