Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2018

Property, plant and equipment at September 30, 2018 and December 31, 2017 consisted of the following:



	Estimated Useful Life (in Years)	September 30, 2018			December 31, 2017
Energy systems	1 - 15 years	$	12,209,144		$	12,466,642
Machinery and equipment	5 - 7 years	1,355,617			1,215,951
Furniture and fixtures	5 years	104,317			205,320
Computer software	3 - 5 years	274,169			115,253
Leasehold improvements	*	450,792			440,519
		14,394,039			14,443,685
Less - accumulated depreciation and amortization		(3,286,530		)	(2,177,974		)
		$	11,107,509		$	12,265,711

* Lesser of estimated useful life of asset or lease term