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Inventory (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Inventory.
Raw materials and supplies	$ 18,501,386	$ 8,881,596
Work-in-process	237,268	219,327
Finished goods	5,996,947	1,305,397
Total inventory	$ 24,735,601us-gaap_InventoryNet	$ 10,406,320us-gaap_InventoryNet

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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