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Cost of revenues and general and administrative expenses | 12 Months Ended
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Dec. 31, 2013
Cost of revenues and general and administrative expenses [Abstract] |
Disclosure Of Other Operating Cost And Expense [Text Block] | 14. Cost of revenues and general and administrative expenses
|  | Year ended December 31, |
|  | 2013 |  | 2012 |  | 2011 |
Cost of revenues consist of: |  |  |  |  |  |  |  |  |  |
Electricity |  | $ | 13,634,617 |  | $ | 14,473,583 |  | $ | 12,622,788 |
Depreciation |  |  | 4,822,967 |  |  | 6,959,912 |  |  | 5,537,098 |
Fuel oil |  |  | 10,106,409 |  |  | 10,078,724 |  |  | 7,195,692 |
Employee costs |  |  | 4,422,093 |  |  | 4,423,899 |  |  | 4,276,682 |
Maintenance |  |  | 2,332,893 |  |  | 2,849,453 |  |  | 2,140,776 |
Royalties |  |  | 1,357,988 |  |  | 1,451,672 |  |  | 1,406,160 |
Insurance |  |  | 1,499,201 |  |  | 1,625,733 |  |  | 1,545,771 |
Other |  |  | 2,140,084 |  |  | 1,595,284 |  |  | 1,407,458 |
|  | $ | 40,316,252 |  | $ | 43,458,260 |  | $ | 36,132,425 |
General and administrative expenses consist of: |  |  |  |  |  |  |  |  |  |
Employee costs |  | $ | 6,218,948 |  | $ | 5,751,142 |  | $ | 5,265,360 |
Insurance |  |  | 969,370 |  |  | 968,662 |  |  | 965,003 |
Professional fees |  |  | 1,798,939 |  |  | 2,097,294 |  |  | 3,112,678 |
Directors’ fees and expenses |  |  | 853,478 |  |  | 608,429 |  |  | 551,132 |
Depreciation |  |  | 290,622 |  |  | 421,851 |  |  | 252,303 |
Other |  |  | 5,712,946 |  |  | 4,695,439 |  |  | 3,505,174 |
|  | $ | 15,844,303 |  | $ | 14,542,817 |  | $ | 13,651,650 |

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- Definition The entire disclosure for cost of revenues and general and administrative expenses. + References No definition available. + Details
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