OVERVIEW OF BUSINESS AND BASIS OF PRESENTATION (Tables)

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Changes in Allowance for Doubtful Accounts

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2020		2019		2020
Beginning balance	$	572	$	1,020	$	169	$	255
Bad debt expense (reversal)	414		(45)		1,066		1,281
Write-offs, net of recoveries	(537)		15		(786)		(546)
Ending balance	$	449	$	990	$	449	$	990