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Balance Sheets Details (Tables)
 9 Months Ended
Sep. 30, 2023
Balance Sheets Details [Abstract]  
Schedule of Cash and Cash Equivalents
Cash equivalents as of September 30, 2023 and December 31, 2022, consisted of the following (in thousands):
 September 30, 2023December 31, 2022
 Adjusted CostEstimated Fair ValueAdjusted CostEstimated Fair Value
Money market funds (1)
$65,585 $65,585 $77,309 $77,309 
(1) Money market funds are classified in cash and cash equivalents on our unaudited condensed consolidated balance sheets. Average contractual maturities (in days) is not applicable.
Schedule of Inventory Components Inventories consisted of the following (in thousands):
September 30, 2023December 31, 2022
Raw materials$108 $108 
Work-in-process— 91 
Finished goods2,197 1,830 
Total Inventories$2,305 $2,029 
Schedule of Property and Equipment, Net Property and equipment, net consisted of the following (in thousands):
September 30, 2023December 31, 2022
Laboratory equipment$36,376 $39,679 
Leasehold improvements11,750 16,633 
Computer equipment and software3,096 3,039 
Office equipment and furniture1,366 1,345 
Construction in progress1,781 1,739 
Property and equipment54,369 62,435 
Less: accumulated depreciation and amortization(39,087)(39,821)
Property and equipment, net
$15,282 $22,614 
Depreciation expense included in both research and development expenses and selling, general and administrative expenses in the unaudited condensed consolidated statements of operations was as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
Depreciation expense$1,357 $1,405 $4,302 $3,961 
Schedule of Goodwill
 Goodwill
Goodwill
Balance at January 1, 2023
$3,241 
Impairment(778)
Balance at September 30, 2023
$2,463 
Schedule of Other Accrued Liabilities Other accrued liabilities consisted of the following (in thousands):
September 30, 2023December 31, 2022
Accrued professional and outside service fees$5,149 $3,495 
Accrued purchases 2,644 10,852 
Other1,003 932 
Total other accrued liabilities$8,796 $15,279