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PREPAID EXPENSE AND OTHER CURRENT ASSETS (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Prepaid Expense and Other Current Assets    
Other receivables $ 3,387 $ 3,712
Prepaid expense 2,207 633
Deposits 53 7
Other current assets 184 271
Total $ 5,831 $ 4,623