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Taxes Payable (Detail) (USD $) | Jun. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Accounts Payable and Accrued Liabilities [Line Items] |  |
Income tax payable | $ 1,957,493 | $ 1,761,452
Mineral resource compensation fee payable | 365,942 | 410,719
Value added tax payable | 793,338 | 540,463
Land use tax payable | 882,821 | 1,081,117
Other tax payables | 232,487 | 264,799
Total | $ 4,232,081 | $ 4,058,550

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