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Other Current Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Other Current Assets    
Prepaid insurance $ 1,913 $ 505
Prepaid IT 796 698
Prepaid expenses - other 4,235 3,371
Value-added tax ("VAT") receivable 6,364 11,920
Receivable - other 1,111 2,176
Other 96 177
Total $ 14,515 $ 18,847