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Note 1 - Summary of Significant Accounting Policies - Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Raw Materials $ 15,798 $ 15,245
Work in Process 588 479
Finished Goods 556 41
Reserves (1,579) (1,486)
Total $ 15,363 $ 14,279 [1]
[1] The balance sheet at December 31, 2019 has been derived from the audited financial statements at that date