Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2021

Accounting Policies [Abstract]

Summary of changes in the allowance for doubtful accounts and sales allowances

The following table summarizes the changes in the allowance for doubtful accounts and sales allowances (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Allowances, at beginning of period	$	6,149	$	7,887	$	7,147	$	6,591
Charged as a reduction of revenue	1,287		2,959		2,566		5,357
Charged to bad debt expense in general and administrative expenses	236		1,260		468		3,485
Write-offs, net of recoveries	(1,883)		(1,802)		(4,392)		(5,129)
Allowances, at end of period	$	5,789	$	10,304	$	5,789	$	10,304