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Balance Sheets Details
 9 Months Ended
Sep. 30, 2024
Balance Sheets Details [Abstract]  
Balance Sheets Details Balance Sheets Details
Inventories
Inventories consisted of the following (in thousands):
September 30, 2024December 31, 2023
Raw materials$— $108 
Work-in-process36 7 
Finished goods2,067 2,570 
Total Inventories$2,103 $2,685 
Prepaid expenses and other current assets
As of September 30, 2024, prepaid expenses and other current assets consisted of prepaid expenses of $3.2 million and other current assets of $0.3 million. As of December 31, 2023, prepaid expenses and other current assets consisted of prepaid expenses of $4.6 million and other current assets of $0.6 million.
Property and Equipment, net
Property and equipment, net consisted of the following (in thousands):
September 30, 2024December 31, 2023
Laboratory equipment$36,468 $37,216 
Leasehold improvements12,086 11,912 
Computer equipment and software2,675 2,565 
Office equipment and furniture1,131 1,469 
Construction in progress1,629 1,636 
Property and equipment53,989 54,798 
Less: accumulated depreciation and amortization(40,723)(39,311)
Property and equipment, net$13,266 $15,487 
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,
2024202320242023
Research and development$965 $1,121 $3,017 $3,606 
Selling, general and administrative219 236 658 696 
Total depreciation expense$1,184 $1,357 $3,675 $4,302 
Other Accrued Liabilities
Other accrued liabilities consisted of the following (in thousands):
September 30, 2024December 31, 2023
Accrued purchases $3,291 $1,402 
Accrued professional and outside service fees2,810 2,330 
Other404 1,003 
Total other accrued liabilities$6,505 $4,735