4. INVENTORIES (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Materials	$ 911,054	$ 2,043,843
Work in process	10,284	121,624
Finished goods	6,519,012	5,762,211
Total inventories	$ 7,440,350	$ 7,927,678

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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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