Inventories (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Schedule of inventory
Raw materials	$ 5,687,612	$ 5,606,073
Work-in-progress	7,296,733	7,919,403
Finished goods	36,770,852	23,916,206
Inventory gross	49,755,197	37,441,682
Less: allowance for obsolete inventories	(3,716,741)	(566,878)
Total inventories	$ 46,038,456	$ 36,874,804

Certain changes made in the current period to the value and amount of inventory reported.

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Amount before last-in first-out (LIFO) and valuation reserves of merchandise or goods held by the entity that are readily available for sale.

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Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).

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