Inventory (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Inventory [Line Items]
Total inventory	$ 5,979,359us-gaap_InventoryGross	$ 5,587,224us-gaap_InventoryGross
Less current portion	1,738,382us-gaap_InventoryNet	1,383,135us-gaap_InventoryNet
Inventory (non-current)	4,240,977us-gaap_InventoryNoncurrent	4,204,089us-gaap_InventoryNoncurrent
Water stock [Member]
Inventory [Line Items]
Total inventory	38,353	28,222
Consumables stock [Member]
Inventory [Line Items]
Total inventory	204,180	224,584
Spare parts stock [Member]
Inventory [Line Items]
Total inventory	$ 5,736,826	$ 5,334,418

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.

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- 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

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 35

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6386567&loc=d3e3927-108312

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

+ Details

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- Definition

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

+ References

+ Details

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