XML 50 R36.htm IDEA: XBRL DOCUMENT v3.20.4
Summary of Significant Accounting Policies - Advanced Hire, Prepaid Expenses and Other Current Assets (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Advance hire $ 5,026,953 $ 3,985,826
Prepaid expenses 3,706,396 4,924,557
Accrued receivables 6,823,409 6,466,068
Margin Deposit 814,062 269,379
Other current assets 3,145,125 3,124,995
Total $ 19,515,945 $ 18,770,825