ACCOUNTS RECEIVABLE, NET - Schedule of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounts receivable, net
Accounts receivable, gross	$ 17,995	$ 17,352
Less: Allowance for credit losses	(4,314)	(4,363)	$ (4,792)	$ (5,297)
Total	13,681	12,989
Billed
Accounts receivable, net
Accounts receivable, gross	11,832	11,993
Unbilled
Accounts receivable, net
Accounts receivable, gross	$ 6,163	$ 5,359