Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Marketable Securities (Details)

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Summary of Significant Accounting Policies - Marketable Securities (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments $ 11,950 $ 83,706
Corporate Bonds    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 5,908 38,244
U.S. Treasury    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 609 19,556
U.S. agency and government sponsored securities    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 1,852 9,560
U.S. states and municipalities    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 3,581 $ 10,906
Level 1    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 6,517  
Level 1 | Corporate Bonds    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 5,908  
Level 1 | U.S. Treasury    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 609  
Level 1 | U.S. agency and government sponsored securities    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 0  
Level 1 | U.S. states and municipalities    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 0  
Level 2    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 5,433  
Level 2 | Corporate Bonds    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 0  
Level 2 | U.S. Treasury    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 0  
Level 2 | U.S. agency and government sponsored securities    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments 1,852  
Level 2 | U.S. states and municipalities    
Debt Securities, Available-for-Sale [Line Items]    
Marketable investments $ 3,581