3. Inventories (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Materials	$ 897,973	$ 911,054
Work in process	77,255	10,284
Finished goods	3,203,506	6,519,012
Total inventories	$ 4,178,734	$ 7,440,350

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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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