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Balance Sheet Components
 3 Months Ended
Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Balance Sheet Components Balance Sheet Components
Inventory
Inventories consist of the following (in thousands):
March 31,December 31,
20242023
Raw materials$3,843 $4,090 
Work-in-process1,363 627 
Finished goods6,210 6,497 
Total$11,416 $11,214 
Property and Equipment, net
Property and equipment, net consists of the following (in thousands):
March 31,December 31,
20242023
Machinery, equipment, furniture and fixtures$4,606 $4,522 
Computer equipment and software1,828 1,822 
Leasehold improvements2,426 2,426 
8,860 8,770 
Less: Accumulated depreciation(7,812)(7,767)
Property and equipment, net $1,048 $1,003 
Depreciation expense for the three months ended March 31, 2024 and 2023 was less than $0.1 million and less than $0.1 million, respectively.
Accrued Liabilities
Accrued liabilities consist of the following (in thousands):
March 31,December 31,
20242023
Payroll and related expenses$5,942 $9,655 
Inventory purchases567 588 
Professional fees73 30 
Other708 907 
Total accrued liabilities$7,290 $11,180