Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities - Marketable Securities (Details)

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Marketable Securities - Marketable Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost $ 10,109 $ 12,838
Unrealized Loss (727) (888)
Fair Value 9,382 11,950
Corporate Bonds    
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost 5,263 6,333
Unrealized Loss (365) (425)
Fair Value 4,898 5,908
U.S. Treasury    
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost   646
Unrealized Loss   (37)
Fair Value   609
U.S. Agency and Government Sponsored Securities    
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost 1,999 2,000
Unrealized Loss (148) (148)
Fair Value 1,851 1,852
U.S. States and Municipalities    
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost 2,847 3,859
Unrealized Loss (214) (278)
Fair Value $ 2,633 $ 3,581