Inventories (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Summary of inventories
Raw materials	$ 4,341,844	$ 3,994,624
Finished goods	5,904,034	5,354,097
Inventories, gross	10,245,878	9,348,721
Inventory reserves	(277,987)	(274,295)
Inventories, net	$ 9,967,891	$ 9,074,426

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.

+ References

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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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 of valuation reserve for inventory.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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