Receivable and Allowance for Credit Losses (Tables)

6 Months Ended

Jun. 30, 2021

Receivable and Allowance for Credit Losses

Schedule of allowances for credit losses related to trade receivables

	Three months ended				Six months ended
	June 30,				June 30,
	2021		2020		2021		2020
	(in thousands)
Balance, beginning of period	$	—	$	—	$	—	$	818
Provision for credit losses		—		—		—		—
Charge-offs		—		—		—		(818)
Recoveries		—		—		—		—
Balance, end of period	$	—	$	—	$	—	$	—