Inventories (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Components of inventories
Raw materials	$ 1,293,112	$ 690,824
Work-in-process	1,030,398	1,593,815
Finished goods	1,718,709	635,771
Inventory gross	4,042,219	2,920,410
Less: reserve for obsolete inventories	(1,068,196)	(1,093,326)
Inventory net	$ 2,974,023	$ 1,827,084

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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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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