PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
PREPAID EXPENSES AND OTHER CURRENT ASSETS
Prepaid operating expenses	$ 8,463	$ 5,705
Prepaid dues and subscriptions	2,013	2,674
Prepaid insurance	1,300	798
Prepaid taxes	700	395
Prepaid rent	447	383
Government grants receivable		429
Termination fee receivable	9,950
Other	2,114	5,941
Total prepaid expenses and other current assets	$ 24,987	$ 16,325