PROPERTY, PLANT AND EQUIPMENT

6 Months Ended

Jun. 30, 2023

Property, Plant and Equipment [Abstract]

Presented in the table below are the major classes of property, plant and equipment by category as of the below dates:


	As of June 30, 2023
(in thousands)	Cost		Accumulated Depreciation		Net Book Value
Building	$	81,351	$	1,347	$	80,004
Machinery and equipment	324,968		11,264		313,704
Leasehold Improvements	2,957		1,122		1,835
Fixtures and Furnishings	628		128		500
Land improvements	150		27		123
Land	1,150		—		1,150
Construction in process	231,502		—		231,502
Total property, plant and equipment	$	642,706	$	13,888	$	628,818


	As of December 31, 2022
(in thousands)	Cost		Accumulated Depreciation		Net Book Value
Building	$	12,534	$	1,016	$	11,518
Machinery and equipment	23,728		6,674		17,054
Leasehold Improvements	2,957		803		2,154
Fixtures and Furnishings	529		83		446
Land improvements	150		22		128
Land	1,150		—		1,150
Construction in process	473,269		—		473,269
Total property, plant and equipment	$	514,317	$	8,598	$	505,719

Depreciation expense is recorded within operating costs in the condensed consolidated statements of comprehensive loss and amounted to $4.0 million and $5.3 million for the three and six months ended June 30, 2023, respectively, and $0.9 million and $1.7 million for the three and six months ended June 30, 2022, respectively.