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Short-Term Bank Loans (Parenthetical) (Detail) (USD $)
 12 Months Ended 6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Dec. 31, 2011
Accounts receivable factoring facility obtained from Industrial & Commercial Bank of China On March 16, 2011
Jun. 30, 2012
Accounts receivable factoring facility obtained from Industrial & Commercial Bank of China On March 13, 2012
Jun. 30, 2012
Accounts receivable factoring facility obtained from Industrial & Commercial Bank of China On August 18, 2011
Dec. 31, 2011
Accounts receivable factoring facility obtained from Industrial & Commercial Bank of China On August 18, 2011
Dec. 31, 2011
Maximum
Accounts receivable factoring facility obtained from Industrial & Commercial Bank of China On March 16, 2011
Jun. 30, 2012
Maximum
Accounts receivable factoring facility obtained from Industrial & Commercial Bank of China On March 13, 2012
Jun. 30, 2012
Maximum
Accounts receivable factoring facility obtained from Industrial & Commercial Bank of China On August 18, 2011
Short-term Debt [Line Items]                  
Loan, issuance date     Mar. 16, 2011 Mar. 13, 2012 Aug. 18, 2011        
Short-term bank loans $ 2,771,487 $ 2,833,619 $ 2,046,503 [1] $ 1,979,634 [2] $ 791,853 [3] $ 787,116 [3] $ 2,046,503 $ 1,979,634 $ 791,853
Short-term bank loans, fixed interest rate     6.4236% 8.856% 8.528%        
Debt instrument interest rate as percentage of prime rate     106.00%            
Loan, maturity date     Feb. 27, 2012 Jan. 04, 2013 Aug. 15, 2012        
Debt instrument, additional interest rate as percentage above prime rate       3.50%          
[1] On March 16, 2011, the Company obtained from the Industrial & Commercial Bank of China another accounts receivable factoring facility with a maximum credit limit of $2,046,503 as of December 31, 2011. Under the factoring agreement, the bank has recourse against the Company if the receivables, which remain in the Company's books at all times, are not fully collected. The term of the factoring facility expired on February 27, 2012 and carried an interest rate of 6.4236% per annum, which is 106% of the prime rate for the loan set forth by the People's Bank of China at the time of funding.
[2] On March 13, 2012, the Company obtained from the Industrial & Commercial Bank of China another accounts receivable factoring facility with a maximum credit limit of $1,979,634 as of June 30, 2012. Under the factoring agreement, the bank has recourse against the Company if the receivables, which remain in the Company's books at all times, are not fully collected. The term of the factoring facility expired on January 4, 2013 and carried an interest rate of 8.856% per annum as of June 30, 2012, or 3.5% plus the prime rate for the loan set forth by the People's Bank of China at the time of funding.
[3] On August 18, 2011, the Company obtained from the Industrial & Commercial Bank of China a new accounts receivable factoring facility with a maximum credit limit of $791,853 as of June 30, 2012. Under the factoring agreement, the bank has recourse against the Company if the receivables, which remain in the Company's books at all times, are not fully collected. The term of the factoring facility expires on August 15, 2012 and carries an interest rate of 8.528% per annum.