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Energy and Related Sales, Net (Tables) | 12 Months Ended
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Dec. 31, 2014
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Summary of Energy and Related Sales Net | The following table summarizes this activity for each of the past three years:
|  | Year ended December 31 |
In thousands |  |  | 2014 |  |  |  | 2013 |  |  |  | 2012 |
Energy sales |  | $ | 11,886 |  |  | $ | 8,189 |  |  | $ | 5,284 |
Costs to produce |  |  | (6,204 | ) |  |  | (6,784 | ) |  |  | (4,187 | )
Net |  |  | 5,682 |  |  |  | 1,405 |  |  |  | 1,097 |
Renewable energy credits |  |  | 2,245 |  |  |  | 1,748 |  |  |  | 5,903 |
Total |  | $ | 7,927 |  |  | $ | 3,153 |  |  | $ | 7,000 |

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- Definition Schedule of revenues and expenses directly related to the sales of power generated by the Company not otherwise consumed in operations. + References No definition available. + Details
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