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Cost of revenues and general and administrative expenses (Tables)
 12 Months Ended
Dec. 31, 2015
Cost of revenues and general and administrative expenses [Abstract]  
Cost Of Revenues And General And Administrative Expenses [Table Text Block]
 
 
Year Ended December 31,
 
 
 
2015
 
2014
 
2013
 
Cost of revenues consist of:
 
 
 
 
 
 
 
 
 
 
Electricity
 
$
10,675,287
 
$
14,631,638
 
$
13,634,617
 
Depreciation
 
 
5,270,454
 
 
5,077,293
 
 
4,822,967
 
Fuel oil
 
 
4,974,421
 
 
8,726,195
 
 
10,106,409
 
Employee costs
 
 
4,669,445
 
 
4,630,609
 
 
4,422,093
 
Cost of plant sales
 
 
878,396
 
 
1,470,045
 
 
-
 
Maintenance
 
 
3,429,736
 
 
3,131,947
 
 
2,332,893
 
Retail license royalties
 
 
1,427,073
 
 
1,405,067
 
 
1,357,988
 
Insurance
 
 
1,187,097
 
 
1,397,799
 
 
1,499,201
 
Other
 
 
1,677,735
 
 
1,972,987
 
 
2,140,084
 
 
 
$
34,189,644
 
$
42,443,580
 
$
40,316,252
 
 
 
 
 
 
 
 
 
 
 
 
General and administrative expenses consist of:
 
 
 
 
 
 
 
 
 
 
Employee costs
 
$
6,459,612
 
$
6,314,908
 
$
6,218,948
 
Insurance
 
 
802,386
 
 
923,089
 
 
969,370
 
Professional fees
 
 
941,193
 
 
1,424,927
 
 
1,005,495
 
Directors’ fees and expenses
 
 
754,145
 
 
686,228
 
 
752,044
 
Depreciation
 
 
218,032
 
 
278,478
 
 
290,622
 
NSC project expenses
 
 
2,168,408
 
 
3,702,332
 
 
3,158,309
 
Other
 
 
3,114,718
 
 
3,324,477
 
 
3,449,515
 
 
 
$
14,458,494
 
$
16,654,439
 
$
15,844,303