Note 3 - Inventories and Other Deferred Costs - Summary of Inventories and Other Deferred Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Raw materials	$ 5,359	$ 4,085
Work-in-process	6,238	5,095
Finished products	23,032	16,391
Other deferred costs	4,898	1,817
Total inventory and other deferred costs	$ 39,527	$ 27,388