Note 9 - Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Employee related expenses	$ 4,827	$ 5,536
Royalties	1,291	1,354
Accrued discount	1,173
Professional services	959	863
Corporate tax	105	1,616
Other accrued liabilities	2,041	1,522
Total accrued liabilities	$ 10,396	$ 10,891