SIGNIFICANT ACCOUNTING POLICIES - Schedule of reconciliation of the allowance for doubtful accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of the period	$ 1,402	$ 1,466	$ 1,143
Charges to earnings	2,472	1,785	1,697
Write-off of uncollectible accounts receivable	(2,424)	(1,859)	(1,400)
Recoveries collected	6	10	26
Balance, end of the period	$ 1,456	$ 1,402	$ 1,466