Other Receivables and Prepayments (Detail) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Prepaid insurance	$ 378,000	$ 123,250
Other receivables	86,475	24,675
Utility deposits	78,852	79,354
Recoverable input VAT		467,858
Less: Allowance for valuation and doubtful debts
Other receivables, deposits and prepayments	1,050,111	1,882,864
Prepaid research and development costs
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Prepayments	506,784	1,154,704
Other prepayments
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Prepayments		$ 33,023