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Prepaid expenses and other current assets (Tables)
12 Months Ended
Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepaid Expenses And Other Current Assets

Prepaid expenses and other current assets consist of the following:

    December 31,
2020
    December 31,
2019
 
Prepaid voyage costs $ 284   $ 338  
Inventories   6,267     6,281  
Claims receivable   633     2,939  
Other   899     905  
Total prepaid expenses and other current assets $ 8,083   $ 10,463