Inventories (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Components of inventories
Raw materials	$ 1,067,044	$ 1,003,359
Work-in-process	1,333,873	639,345
Finished goods	415,423	772,652
Inventory gross	2,816,340	2,415,356
Less: reserve for obsolete inventories	(21,337)	(21,177)
Inventory net	$ 2,795,003	$ 2,394,179

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
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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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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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