Other Payables and Accruals (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Accounts Payable and Accrued Liabilities [Line Items]
Construction cost payable	$ 1,958,204	$ 3,598,053
Other taxes payable	1,768,702	1,450,360
Accrued staff costs	763,430	667,969
Other payables	447,068	654,451
Other payables and accruals	$ 4,937,404	$ 6,370,833