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Cash and Cash Equivalents
12 Months Ended
Dec. 31, 2023
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents

(3) Cash and Cash Equivalents

Cash equivalents consisted of the following as of as of December 31, 2023 and 2022 (in thousands):

 

 

December 31, 2023

 

 

December 31, 2022

 

 

 

Cost

 

 

Estimated Fair Value

 

 

Cost

 

 

Estimated Fair Value

 

Institutional money market funds

 

$

2,899

 

 

$

2,899

 

 

$

18,664

 

 

$

18,664