Note 3 - Inventories and Other Deferred Costs - Summary of Inventories and Other Deferred Costs (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Raw materials	$ 5,354	$ 5,359
Work-in-process	5,510	6,238
Finished products	29,608	23,032
Other deferred costs	5,868	4,898
Total inventory and other deferred costs	$ 46,340	$ 39,527