Marketable Investments - Unrealized Losses on Debt Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Less than 12 Months - Market Value	$ 8,787	$ 13,098
Less than 12 Months - Unrealized Losses	13	8
12 Months or Greater - Market Value	5,927	6,872
12 Months or Greater - Unrealized Losses	36	71
Corporate obligations [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 Months - Market Value	8,787	13,098
Less than 12 Months - Unrealized Losses	13	8
12 Months or Greater - Market Value	4,930	4,879
12 Months or Greater - Unrealized Losses	33	64
Federal agency obligations [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than 12 Months - Market Value	0	0
Less than 12 Months - Unrealized Losses	0	0
12 Months or Greater - Market Value	997	1,993
12 Months or Greater - Unrealized Losses	$ 3	$ 7