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Supplementary Balance Sheet Information (Tables)
 3 Months Ended
Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Investments Available-for-sale
Investments available for sale consist of the following:

As of March 31, 2024
(in thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Market Value
Maturity less than 1 year:
Certificate of deposit$6,501 $10 $— $6,511 
Corporate debt securities14,686 6 (27)14,665 
Commercial paper5,288 2 (1)5,289 
U.S. treasury securities16,342 — (112)16,230 
Total maturity less than 1 year42,817 18 (140)42,695 
Maturity 1 to 2 years:
Corporate debt securities3,654 13 (4)3,663 
U.S. treasury securities2,190 — (19)2,171 
Total maturity 1 to 2 years5,844 13 (23)5,834 
Total short-term investments$48,661 $31 $(163)$48,529 


As of December 31, 2023
(in thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Market Value
Maturity less than 1 year:
Certificate of deposit$8,317 $16 $— $8,333 
Corporate debt securities10,948 8 (16)10,940 
Commercial paper6,193 9 — 6,202 
Non U.S. government835 — (1)834 
Total maturity less than 1 year26,293 33 (17)26,309 
Maturity 1 to 2 years:
Corporate debt securities8,437 6 (10)8,433 
U.S. treasury securities18,505 — (79)18,426 
Total maturity 1 to 2 years26,942 6 (89)26,859 
Total short-term investments$53,235 $39 $(106)$53,168 
Investments Available-for-sale in a Continuous Unrealized Loss Position
Investments available for sale that have been in a continuous unrealized loss position for greater than one-year consist of the following:
As of March 31, 2024
(in thousands)Fair Market ValueGross Unrealized Loss
Corporate debt securities$1,546 $(6)

As of December 31, 2023
(in thousands)Fair Market ValueGross Unrealized Loss
Corporate debt securities$397 $(3)
Schedule of Components of Property and Equipment
Property and equipment consist of the following:
 
(in thousands)As of March 31,
2024		As of December 31,
2023
Furniture and office equipment$1,067 $1,067 
Leasehold improvements2,568 2,568 
Laboratory equipment1,419 1,355 
5,054 4,990 
Less—accumulated depreciation and amortization(3,855)(3,752)
Property and equipment, net$1,199 $1,238 
Schedule of Accrued Liabilities
Accrued liabilities consisted of the following:

(in thousands)As of March 31,
2024		As of December 31,
2023
Accrued compensation$1,234 $2,737 
Clinical trials3,783 4,309 
Research agreements and services692 530 
Other accrued liabilities247 207 
Total accrued liabilities$5,956 $7,783