Note 8 - Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Employee related expenses	$ 3,762	$ 4,827
Accrued discount	1,172	1,173
Corporate tax	1,090	105
Professional services	292	959
Royalties	4	1,291
Other accrued liabilities	1,596	2,041
Total accrued liabilities	$ 7,916	$ 10,396