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Balance Sheet Items
 6 Months Ended
Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Balance Sheet Items BALANCE SHEET COMPONENTS
Prepaid expenses and other current assets consist of the following:

June 30,December 31,
20222021
Prepaid expenses$305 $949 
Prepaid research and development costs603 632 
Other current assets778 553 
Total$1,686 $2,134 

Property and equipment, net, consists of the following:

June 30,December 31,
20222021
Computer equipment and software$183 $156 
Furniture and fixtures203 193 
Lab equipment829 748 
Leasehold improvements840 840 
Property and equipment2,055 1,937 
Less: accumulated depreciation(1,044)(824)
Property and equipment, net$1,011 $1,113 


Depreciation expense for the three and six months ended June 30, 2022 were $112 and $220, respectively. Depreciation expense for the three and six months ended June 30, 2021 were $86 and $165, respectively.

Accrued liabilities consist of the following:
June 30,December 31,
20222021
Accrued other liabilities$1,317 $748 
Accrued clinical trial liabilities869 841 
Total$2,186 $1,589