SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Allowance for credit loss rollfoward

The following table summarizes the changes in the allowance for losses and sales adjustments:

	Years ended December 31,
	2020		2019		2018
Balance at beginning of year	$	5,738	$	4,647	$	5,427
Provisions for losses and sales adjustments - accounts receivable	3,517		1,636		(569)
Collections of accounts previously written off	—		(545)		(211)
Balance at end of year	$	9,255	$	5,738	$	4,647