Quarterly report pursuant to Section 13 or 15(d)

PROPERTY, PLANT AND EQUIPMENT

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PROPERTY, PLANT AND EQUIPMENT
9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT
Presented in the table below are the major classes of property, plant and equipment by category as of the below dates:
As of September 30, 2021
(in thousands) Cost Accumulated Depreciation Net Book Value
Building $ 12,029  $ 618  $ 11,411 
Machinery and equipment 18,569  3,645  14,924 
Fixtures and Furnishings 104  34  70 
Land improvements 150  10  140 
Land 1,150  —  1,150 
Construction in process 161,527  —  161,527 
Total property, plant and equipment $ 193,529  $ 4,307  $ 189,222 
As of December 31, 2020
(in thousands) Cost Accumulated
Depreciation
Net Book Value
Building $ 12,029  $ 387  $ 11,642 
Machinery and equipment 15,982  2,388  13,594 
Fixtures and Furnishings 104  22  82 
Land improvements 150  147 
Land 1,150  —  1,150 
Construction in process 47,452  —  47,452 
Total property, plant and equipment $ 76,867  $ 2,800  $ 74,067 
Depreciation expense is recorded within operating costs in the condensed consolidated statements of comprehensive loss and amounted to $1.5 million and $1.4 million for the nine months ended September 30, 2021 and 2020, respectively, and $522 thousand and $475 thousand for the three months ended September 30, 2021 and 2020, respectively.