Property, Plant and Equipment

12 Months Ended

Dec. 31, 2016

Property Plant And Equipment [Abstract]

4. Property, Plant and Equipment

The following table sets forth the Company’s property, plant and equipment by classification (in thousands).

		December 31,
		2016			2015
Construction in progress	-	$	293		$	1,801
Plant machinery and equipment (1)	10 years		15,397			14,113
Site improvements	10 years		7,050			7,039
Agri-Energy Retrofit asset (1)	20 years		70,791			65,457
Lab equipment, furniture and fixtures and vehicles	5 years		6,431			6,389
Demonstration plant	2 years		3,597			3,597
Buildings	10 years		2,543			2,543
Computer, office equipment and software	3 years		1,594			1,566
Leasehold improvements, pilot plant, land and support equipment	2 - 5 years		2,526			2,175
Total property, plant and equipment			110,222			104,680
Less accumulated depreciation and amortization			(34,630	)		(27,903	)
Property, plant and equipment, net		$	75,592		$	76,777

(1)

In May 2016, certain assets of the Agri-Energy retrofit asset were reclassified from plant, machinery and equipment to the Agri-Energy retrofit asset.

As of December 31, 2016 and 2015, the Company has $0.7 million and $0.7 million , respectively, of capital lease assets included in computer, office equipment and software. The Company recorded amortization of capital lease assets of $0.1 million during each of the years ended December 31, 2016, 2015 and 2014, as a component of depreciation and amortization in the consolidated statements of cash flows.

The Company recorded $6.7 million, $6.6 million, and $4.9 million of depreciation expense for the years ended December 31, 2016, 2015, and 2014, respectively, including $6.0 million, $5.7 million, and $4.0 million of depreciation expense in cost of goods sold for the years ended December 31, 2016, 2015 and 2014 respectively.