Note 1 - Nature of Operations and Summary of Significant Accounting Policies: Inventories: Schedule of Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Text Block [Abstract]
Raw Materials	$ 5,215	$ 5,979
Work-in-process	182	116
Finished goods	465	323
Reserve for obsolete inventory	(3,346)	(3,346)
Inventories, net	$ 2,516	$ 3,072

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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