Other Payables and Accruals (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Accounts Payable and Accrued Liabilities [Line Items]
Accrued staff costs	$ 614,448	$ 763,430
Other taxes payable	1,253,537	1,768,702
Construction cost payable	2,015,848	1,958,204
Research and development costs payable	56,167	0
Other payables	735,960	447,068
Other payables and accruals	$ 4,675,960	$ 4,937,404