Other Payables and Accruals (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Accounts Payable and Accrued Liabilities [Line Items]
Construction cost payable	$ 1,985,628	$ 1,958,204
Other taxes payable	1,833,595	1,768,702
Accrued staff costs	586,413	763,430
Other payables	611,883	447,068
Other payables and accruals	$ 5,017,519	$ 4,937,404