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Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 15,195 $ 19,651
Gross Unrealized Gains 165 157
Estimated Fair Value 15,360 19,808
Interest Receivable 164 151
U.S. government agency bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 15,195 19,651
Gross Unrealized Gains 165 157
Estimated Fair Value $ 15,360 $ 19,808