Inventories: Schedule of Inventory, Current (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Details
Finished goods	$ 1,361	$ 1,363
Work-in-process	1,172	1,375
Raw materials	3,442	3,484
Total	$ 5,975	$ 6,222

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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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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