Inventories (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Summary of inventories
Raw materials	$ 4,808,916	$ 4,320,131
Finished goods	8,000,017	8,049,791
Inventories, gross	12,808,933	12,369,922
Inventory reserves	(284,109)	(284,109)
Inventories, net	$ 12,524,824	$ 12,085,813

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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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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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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