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Balance Sheets Details
 9 Months Ended
Sep. 30, 2020
Balance Sheets Details [Abstract]  
Balance Sheets Details Balance Sheets Details
Inventories
Inventories consisted of the following (in thousands):
September 30, 2020December 31, 2019
Raw materials$77 $7 
Work-in-process28 26 
Finished goods632 338 
    Inventories$737 $371 

Property and Equipment, net
Property and equipment, net consisted of the following (in thousands):
September 30, 2020December 31, 2019
Laboratory equipment$24,837 $23,561 
Leasehold improvements10,774 10,804 
Computer equipment and software3,134 3,016 
Office equipment and furniture1,175 1,461 
Construction in progress602 691 
Property and equipment40,522 39,533 
       Less: accumulated depreciation and amortization(33,233)(33,251)
     Property and equipment, net$7,289 $6,282 

Goodwill
Goodwill had a carrying value of approximately $3.2 million as of September 30, 2020 and December 31, 2019.
Other Accrued Liabilities
Other accrued liabilities consisted of the following (in thousands):
September 30, 2020December 31, 2019
Accrued purchases $3,810 $4,386 
Accrued professional and outside service fees3,142 1,802 
Other618 352 
     Total$7,570 $6,540