Note 4 - Financial Statement Details - Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Refunds and commissions payable	$ 13,876	$ 1,873
Accounts payable	9,869	14,633
Accrued other expense	7,841	8,348
Bonus compensation liability	4,724	5,322
Employee liability	3,856	3,712
Foreign currency forward contract liability	2,083	1,300
Travel certificate liability	870	888
Accrued travel insurance expense	322	477
Income tax liabilities	2	603
Royalty payable	0	1,075
Total accounts payable and accrued expenses	$ 43,443	$ 38,231