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Investments (Tables)
 3 Months Ended
Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Schedule of Unrealized Gains and Losses
The following table summarizes the gross unrealized gains on the Company’s marketable securities as of March 31, 2024:

March 31, 2024
Gross Unrealized
(In thousands)Amortized CostGainsEstimated Fair Value
U.S. government agency bonds$15,195 $165 $15,360 
$15,195 $165 $15,360 
Short-term investments$15,360 
The following table summarizes the gross unrealized gains on the Company’s marketable securities as of December 31, 2023:
December 31, 2023
Gross Unrealized
(in thousands)Amortized CostGainsEstimated Fair Value
U.S. government agency bonds$19,651 $157 $19,808 
$19,651 $157 $19,808 
Short-term investments$19,808