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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

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

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- Definition

Carrying value as of the balance sheet date of liabilities incurred through that date and payable for statutory sales and use taxes, including value added tax. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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