Other Receivables and Prepayments (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Prepaid insurance	$ 303,650	$ 162,000
Other receivables	367,396	118,031
Utility deposits	81,327	79,548
Less: Allowance for valuation and doubtful debts	0	0
Other receivables, deposits and prepayments	766,247	559,955
Prepaid research and development costs
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Prepayments	0	200,376
Other prepayments
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Prepayments	$ 13,874	$ 0