Nature of Business, Liquidity, Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Estimated Depreciable Lives of Property, Plant and Equipment

Depreciation is calculated using the straight-line method over the estimated depreciable lives of the respective assets as follows:

	Depreciable Lives
Energy Servers	15-21 years
Computers, software and hardware	3-5 years
Machinery and equipment	5-10 years
Furniture and fixtures	3-5 years
Leasehold improvements	1-10 years
Buildings	35 years

Property, plant and equipment, net consisted of the following (in thousands):

	December 31,
	2019			2018
				As Restated
Energy Servers	$	650,600		$	757,574
Computers, software and hardware	20,275			16,536
Machinery and equipment	101,650			99,209
Furniture and fixtures	8,339			4,337
Leasehold improvements	35,694			18,629
Building	40,512			40,512
Construction in progress	12,611			41,180
	869,681			977,977
Less: Accumulated depreciation	(262,622		)	(261,226		)
	$	607,059		$	716,751