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Interest and Finance Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Borrowing costs [abstract]    
Interest recovery $ (678) $ (1,179)
Finance fees 2,293 2,391
Accretion expense (Note 17) 6,524 5,973
Interest and finance expense $ 8,139 $ 7,185