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Other Current Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Other Liabilities Disclosure [Abstract]    
Clients' prepayments $ 11,249 $ 13,618
Credit notes 18,993 16,420
Accounts payable relating to capital expenditures 3,834 4,408
Other creditors 1,447 1,213
Deferred revenue 186 227
Total $ 35,709 $ 35,886