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Cash and cash equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Cash and cash equivalents [abstract]    
Fair value of cash and cash equivalents $ 2,366 $ 46
Undrawn borrowing facilities 11,100 12,800
Pledged cash 2,435 1,350
Non current restricted cash and cash equivalents 1,250 0
Current restricted cash and cash equivalents 1,185 1,350
Fair value of restricted cash and cash equivalents 2,435 1,350
Fair value of non current restricted cash and cash equivalents 1,250 0
Fair value of current restricted cash and cash equivalents $ 1,185 $ 1,350