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26. Capital Lease Obligations (Detail)
 1 Months Ended 12 Months Ended
Nov. 30, 2009
USD ($)
Nov. 30, 2009
CNY
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2012
Interest Rate, Fixed [Member]
Capital Leases, Indemnification Agreements, Description     In November 2009, the Group entered a six-year capital lease agreement for certain equipment under construction. The terms of the lease required an initial payment of RMB5 million (or approximately $802,542) and required a RMB1 million (or approximately $160,508) payment on January 30th of each year after successful completion of production quality tests. The installment and trial run of the equipment was completed in 2010, and the equipment under the capital lease is depreciated over an estimated productive life of 14 years when placed into service after passing production quality tests. As of December 31, 2012 and 2011, the Group had $1,100,366 and $1,453,518, respectively, of equipment subject to the capital lease obligation.     5.31%
Capital Leases, Indemnification Agreements, Payments (in Yuan Renminbi) $ 802,542 5,000,000        
Capital Leases, Indemnification Agreements, Payments 802,542 5,000,000        
Property, Plant and Equipment, Estimated Useful Lives 14 14
Buildings and plant 20 - 33 years
Machinery and equipment 10 - 14 years
Office equipment 5   years
Motor vehicles 5 - 8 years
     
Capital Leased Assets, Gross     1,100,366 1,453,518    
Capital Leases, Income Statement, Amortization Expense     29,629 35,268 39,368  
Capital Leases, Net Investment in Direct Financing Leases, Accumulated Amortization     $ 104,265 $ 74,636