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Project Assets (Details) (USD $)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Property, Plant and Equipment [Line Items] | |||
| Proceeds from government grants | $ 3,262,463 | $ 6,023,767 | $ 6,695,711 |
| Property, Plant and Equipment, Other, Net | 210,744,176 | 207,274,982 | |
| Grant awards and rebates received on project assets | 3,262,463 | 7,310,767 | 6,695,711 |
| Deferred grant income | 8,163,368 | 7,590,730 | |
| Rebates from utility company | 1,287,000 | ||
| Project asset depreciation | 12,594,590 | 11,229,380 | 9,701,399 |
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Renewal Energy Program
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| Property, Plant and Equipment [Line Items] | |||
| Project assets | 270,418,446 | 253,699,036 | |
| Less - accumulated depreciation and amortization | (59,674,270) | (46,424,054) | |
| Property, Plant and Equipment, Other, Net | $ 210,744,176 | $ 207,274,982 | |
| X | ||||||||||
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- Definition
Proceeds from Government Grants No definition available.
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| X | ||||||||||
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- Definition
Proceeds from Government Grants and Rebates Received on Project Assets No definition available.
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| X | ||||||||||
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- Definition
Rebates from Utility Company No definition available.
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| X | ||||||||||
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- Definition
Carrying amount as of the balance sheet date of unearned revenue or income not otherwise specified in the taxonomy which is expected to be taken into income after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cumulative amount of depreciation (related to capitalized assets classified as property, plant and equipment not otherwise defined in the taxonomy) that has been recognized in the income statement. No definition available.
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| X | ||||||||||
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- Definition
The net amount of capitalized assets classified as property, plant and equipment not otherwise defined in the taxonomy. No definition available.
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| X | ||||||||||
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- Definition
Amount of operating expense for depreciation and amortization of regulated operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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