Inventories (Details Narrative) (10-K) - USD ($)	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventory assets	$ 1,284,751	$ 1,216,562	$ 830,504

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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