XML 36 R71.htm IDEA: XBRL DOCUMENT

Cost of revenues and general and administrative expenses (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	$ 42,443,580us-gaap_CostOfRevenue	$ 40,316,252us-gaap_CostOfRevenue	$ 43,458,260us-gaap_CostOfRevenue
Electricity [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	14,631,638	13,634,617	14,473,583
Depreciation [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	5,077,293	4,822,967	6,959,912
Fuel oil [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	8,726,195	10,106,409	10,078,724
Employee costs [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	4,630,609	4,422,093	4,423,899
Cost of plant sales [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	1,470,045	0	0
Maintenance [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	3,131,947	2,332,893	2,849,453
Retail license royalties [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	1,405,067	1,357,988	1,451,672
Insurance [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	1,397,799	1,499,201	1,625,733
Other [Member]
Cost of revenues and general and administrative expenses [Line Items]
Cost Of Revenue	$ 1,972,987	$ 2,140,084	$ 1,595,284