Inventory (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Schedule of inventory
Raw materials	$ 636,005	$ 338,991
Work-in-process	1,361,111	1,337,035
Finished goods	495,278	655,645
Total	$ 2,492,394	$ 2,331,671

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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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