Property, Plant, and Equipment (Tables)

3 Months Ended

Mar. 31, 2022

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

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

	Useful Life (in years)			March 31, 2022		December 31, 2021
Luverne Facility retrofit asset	20			$	70,820	$	70,820
Plant machinery and equipment	10			17,949		17,949
Site improvements	10			7,157		7,157
Lab equipment, furniture and fixtures and vehicles	5			6,813		6,811
Demonstration plant	2			3,597		3,597
Buildings	10			2,543		2,543
Leasehold improvements, pilot plant, land and support equipment	2	to	7	2,841		2,802
Computer, office equipment and software	3	to	6	2,338		2,332
Construction in progress	—			107,848		88,989
Total property, plant and equipment				221,906		203,000
Less accumulated depreciation and amortization				(65,010)		(63,859)
Property, plant and equipment, net				$	156,896	$	139,141

Schedule Of Depreciation And Amortization Expense

The Company recorded depreciation and amortization expense related to property, plant and equipment and intangible assets as follows (in thousands):

	Three Months Ended March 31,
	2022		2021
Depreciation:
Cost of goods sold	$	1,086	$	1,088
Operating expenses	65		56
Patent amortization:
Cost of goods sold	5		5
Operating expenses	286		—
Total depreciation and amortization	$	1,442	$	1,149