Note 2 - Summary of Significant Accounting Policies - Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts payable	$ 14,633	$ 9,326
Accrued other expense	8,348	11,464
Bonus compensation liability	5,322	5,195
Employee liability	3,712	2,943
Refunds and commissions payable	1,873	1,533
Foreign currency forward contract liability	1,300	387
Royalty payable	1,075	1,005
Travel certificate liability	888	1,088
Income tax liabilities	603	576
Accrued travel insurance expense	477	427
Total accounts payable and accrued expenses	$ 38,231	$ 33,944