Property, plant and equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Property, plant and equipment consist of the following as of December 31, 2013 and 2012, respectively:



	2013			2012
Energy Systems	$	25,567,808		$	19,052,933
Computer equipment and software	122,853			109,910
Furniture and fixtures	85,079			81,435
Vehicles	243,139			166,193
	26,018,879			19,410,471
Less — accumulated depreciation	(7,621,242		)	(6,149,328		)
	18,397,637			13,261,143
Construction in progress	3,533,652			3,992,505
	$	21,931,289		$	17,253,648

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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