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Inventory (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Inventory [Line Items]
Total inventory	$ 5,587,224	$ 5,727,842
Inventory	1,383,135	1,757,601
Inventory (non-current)	4,204,089	3,970,241
Water stock [Member]
Inventory [Line Items]
Total inventory	28,222	32,515
Consumables stock [Member]
Inventory [Line Items]
Total inventory	224,584	276,568
Spare parts stock [Member]
Inventory [Line Items]
Total inventory	$ 5,334,418	$ 5,418,759

X

- Definition

Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.6(a))

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X

- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Name Accounting Standards Codification

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- Definition

Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Number 210

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