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Note 2 - Summary of Significant Accounting Policies - Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Prepaid tour expenses $ 10,617 $ 9,846
Prepaid air expense 2,973 3,621
Prepaid marketing, commissions and other expenses 2,622 2,495
Prepaid client insurance 2,516 2,525
Prepaid port agent fees 1,433 1,022
Prepaid corporate insurance 1,078 1,033
Prepaid income taxes 24 809
Total prepaid expenses $ 21,263 $ 21,351