Note 1 - Summary of Significant Accounting Policies - Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Raw Materials	$ 15,314	$ 15,245
Work in Process	607	479
Finished Goods	459	41
Reserves	(1,884)	(1,486)
Total	$ 14,496	$ 14,279	[1]

[1] The balance sheet at December 31, 2019 has been derived from the audited financial statements at that date