Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

Property Plant And Equipment [Abstract]

Property, Plant and Equipment by Classification

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

		December 31,
		2015			2014
Construction in progress	-	$	1,801		$	440
Plant machinery and equipment	10 years		14,113			13,367
Site improvements	10 years		7,039			7,015
Retrofit asset	20 years		65,457			65,601
Lab equipment, furniture and fixtures and vehicles	5 years		6,389			6,385
Demonstration plant	2 years		3,597			3,597
Buildings	10 years		2,543			2,543
Computer, office equipment and software	3 years		1,566			1,490
Leasehold improvements, pilot plant, land and support equipment	2 - 5 years		2,175			2,144
Total property, plant and equipment			104,680			102,582
Less accumulated depreciation and amortization			(27,903	)		(21,342	)
Property, plant and equipment, net		$	76,777		$	81,240