Inventories: Inventories (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Details
Raw material	$ 2,067,234	$ 2,337,278
Work-in-process	1,500,319	1,201,099
Finished goods	1,913,253	1,869,800
Inventories, gross	5,480,806	5,408,177
Valuation reserves	(536,000)	(457,000)
Inventories, net	$ 4,944,806	$ 4,951,177

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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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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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 of valuation reserve for inventory.

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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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