ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of the period	$ 1,756	$ 1,676	$ 1,466	$ 1,143
Bad debt expense	365	583	1,314	1,865
Write-off of uncollectible accounts receivable	(483)	(441)	(1,152)	(1,202)
Recoveries collected	0	5	10	17
Accounts receivable, allowance (in dollars)	$ 1,638	$ 1,823	$ 1,638	$ 1,823	$ 1,466