Annual report pursuant to Section 13 and 15(d)

Basis of Presentation and Summary of Significant Accounting Policies (Tables)

v3.20.4
Basis of Presentation and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]  
Schedule of Estimated Ranges of Useful Lives of Property and Equipment
Property, equipment and leasehold improvements are stated at cost less accumulated depreciation and amortization and depreciated using the straight-line method over their estimated useful lives as follows:
Asset classification Estimated useful life
Laboratory equipment 5 years
Computer equipment and software
3 to 5 years
Office equipment and furniture 5 years
Leasehold improvements Lesser of useful life or lease term
Property and equipment, net consisted of the following (in thousands): 
  December 31,
  2020 2019
Laboratory equipment (1)
$ 25,468  $ 23,561 
Leasehold improvements 10,785  10,804 
Computer equipment and software 3,192  3,016 
Office equipment and furniture 1,246  1,461 
Construction in progress (2)
2,357  691 
Property and equipment 43,048  39,533 
Less: accumulated depreciation and amortization (33,373) (33,251)
Property and equipment, net $ 9,675  $ 6,282 
(1) Fully depreciated property and equipment with a cost of $1.8 million and $1.0 million were retired during the years ended December 31, 2020 and 2019, respectively.
(2) Construction in progress includes equipment received but not yet placed into service pending installation.

Depreciation expense included in the consolidated statements of operations as follows (in thousands):
  Year Ended December 31,
  2020 2019 2018
Depreciation expense $ 1,950  $ 1,570  $ 1,147