Inventories (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Raw materials	$ 25,952,099	$ 21,428,315
Work in progress	10,192,772	6,931,486
Finished goods	18,348,119	14,284,563
Packing materials	14,394	36,797
Consumables	283,077	265,483
Inventories	$ 54,790,461	$ 42,946,644

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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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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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.

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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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Amount before valuation and LIFO reserves of other inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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