Annual report pursuant to Section 13 and 15(d)

Balance Sheets Details (Tables)

v3.20.4
Balance Sheets Details (Tables)
12 Months Ended
Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]  
Schedule of Cash and Cash Equivalents
Cash equivalents at December 31, 2020 and 2019 consisted of the following (in thousands): 

  December 31, 2020 December 31, 2019
  Adjusted Cost Estimated Fair Value Adjusted Cost Estimated Fair Value
   
Money market funds (1) (2)
$ 127,567  $ 127,567  $ 71,248  $ 71,248 

(1) Money market funds are classified in cash and cash equivalents on our consolidated balance sheets.
(2) Average Contractual Maturities (in days) is not applicable.
Schedule of Inventory Components
Inventories consisted of the following (in thousands): 
  December 31,
  2020 2019
Raw materials $ 77  $
Work in process 82  26 
Finished goods 805  338 
Inventories $ 964  $ 371 
Property and Equipment, Net
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 
Schedule of Accrued Liabilities
Other accrued liabilities consisted of the following (in thousands): 
  December 31,
  2020 2019
Accrued purchases $ 7,170  $ 4,386 
Accrued professional and outside service fees 2,589  1,802 
Other 513  352 
Total
$ 10,272  $ 6,540