Note 7 - Accounts Payable and Accrued Expenses - Components of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Trade accounts payable	$ 9,679	$ 22,247
Accrued expenses	44,600	40,718
Total	$ 54,279	$ 62,965