Other Receivables and Prepayments (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Prepaid insurance	$ 136,500	$ 162,000
Other receivables	118,680	118,031
Utility deposits	82,009	79,548
Other receivables, deposits and prepayments	337,189	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	$ 0	$ 0