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ACCOUNT RECEIVABLE, NET - Components of Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Receivables [Abstract]
Billed receivables	$ 19,011		$ 17,798
Unbilled receivables	6,024		8,523
Accounts Receivable, Gross	25,035		26,321
Allowance for expected credit losses	(146)	$ (102)	(51)	$ (51)	$ (64)	$ (196)
Accounts Receivable, Net	$ 24,889		$ 26,270