ACCOUNTS RECEIVABLE, NET - Schedule of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounts receivable, net
Accounts receivable, gross	$ 17,180	$ 14,805
Less: Allowance for credit losses	(3,555)	(3,123)	$ (4,205)	$ (4,363)
Total	13,625	11,682
Billed
Accounts receivable, net
Accounts receivable, gross	10,719	9,826
Unbilled
Accounts receivable, net
Accounts receivable, gross	$ 6,461	$ 4,979