Property, Plant and Equipment, net
12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, net Property, Plant and Equipment, net
The property, plant and equipment, net balances were as follows:
  December 31,
December 31,
Computer equipment
$ 1,380  $ 739 
Furniture and fixtures
783  442 
Laboratory equipment
16,856  1,357 
—  359 
Leasehold improvements
2,205  672 
Construction in process 415  — 
Less: accumulated depreciation
(2,255) (307)
Total property, plant and equipment, net
$ 19,384  $ 3,262 
The table below presents the depreciation expense related to property, plant and equipment for the following periods:
  Successor Predecessor
  Year Ended December 31, 2021 Period from February 10, 2020 to December 31, 2020 Period from January 1, 2020 to June 21, 2020
Depreciation expense
$ 1,944  $ 307  $ 59 

The depreciation expense for the Successor 2021 Period, included $0.1 million of accelerated depreciation due to a reduction of the estimated useful life for certain assets as a result of the early termination of the underlying lease. Refer to Note K for further information.

The Company occasionally designs and builds its own machinery. The cost of these projects, including direct material and labor, and other indirect costs attributable to the construction, are capitalized as construction in progress. No provision for depreciation is made on construction in progress until the related assets are completed and placed in service.