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Interest Expense and Finance Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Interest costs [abstract]      
Interest payable on long-term borrowings $ 1,958 $ 3,721 $ 3,603
Bank charges 59 69 28
Amortization of debt discount 547 293 383
Operating lease liability interest 52 44 51
Other finance expenses 646 28 638
Total $ 3,262 $ 4,155 $ 4,703