PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
PREPAID EXPENSES AND OTHER CURRENT ASSETS
Prepaid operating expenses	$ 2,388	$ 68
Prepaid dues and subscriptions	1,360	189
Prepaid insurance	943	121
Prepaid taxes	827
Government grants receivable	493
Escrow deposits	311
Prepaid rent	176	118
Deferred cost of goods sold		454
Other	752	26
Total prepaid expenses and other current assets	$ 7,250	$ 976