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Note 4 - Inventories - Summary of Inventories (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018
--- | --- | --- | --- | --- | --- | --- | --- | ---
Raw materials | $ 2,979 |  |  |  | $ 1,453 |  |  |
Work in progress | 1,896 |  |  |  | 652 |  |  |
Finished goods | 6,097 |  |  |  | 1,404 |  |  |
Total | $ 10,972 | $ 5,694 | $ 5,306 | $ 4,060 | $ 3,509 | $ 2,911 | $ 2,122 | $ 1,837

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- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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