Inventory (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Schedule of inventory
Raw materials	$ 647,713	$ 791,558
Work-in-process	1,213,813	1,207,457
Finished goods	31,878	519,241
Total	$ 1,893,404	$ 2,518,256

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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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