ACCOUNTS RECEIVABLE, NET - Schedule of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounts receivable, net
Accounts receivable, gross	$ 16,360		$ 16,360			$ 17,352
Less: Allowance for credit losses	(3,379)	$ (4,481)	(3,379)	$ (4,481)	$ (4,314)	(4,363)	$ (4,792)	$ (5,297)
Total	12,981		12,981			12,989
Bad debt expense	(203)	(22)	319	578
Deductions	732	$ 289	1,303	$ 1,394
Billed
Accounts receivable, net
Accounts receivable, gross	10,386		10,386			11,993
Unbilled
Accounts receivable, net
Accounts receivable, gross	$ 5,974		$ 5,974			$ 5,359