Note 3 - Inventories and Other Deferred Costs - Summary of Inventories and Other Deferred Costs (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Raw materials	$ 4,916	$ 4,085
Work-in-process	5,037	5,095
Finished products	22,331	16,391
Other deferred costs	4,411	1,817
Total inventory and other deferred costs	$ 36,695	$ 27,388