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Non-Marketable Equity Securities (Tables)
 12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Summary of Non-marketable Equity Securities The following table summarizes the value of non-marketable equity securities using the measurement alternative (in thousands):

 

 

 

December 31,
2023

 

 

December 31,
2022

 

Initial cost

 

$

1,759

 

 

$

1,759

 

Cumulative net fair value loss

 

 

(1,748

)

 

 

(1,701

)

Carrying value of non-marketable equity securities

 

$

11

 

 

$

58