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Fair Value Measurements - Summary of Company's Fair Value Hierarchy for its Financial Assets and Liabilities (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Assets:    
Fair value of investments $ 67,203 $ 75,098
Money Market Funds [Member]    
Assets:    
Fair value of cash equivalents 50,486 [1] 55,128 [2]
Marketable Investments [Member]    
Assets:    
Fair value of investments [3] 16,717 19,970
Level 1 [Member]    
Assets:    
Fair value of investments 50,486 55,128
Level 1 [Member] | Money Market Funds [Member]    
Assets:    
Fair value of cash equivalents 50,486 [1] 55,128 [2]
Level 1 [Member] | Marketable Investments [Member]    
Assets:    
Fair value of investments [3] 0 0
Level 2 [Member]    
Assets:    
Fair value of investments 16,717 19,970
Level 2 [Member] | Money Market Funds [Member]    
Assets:    
Fair value of cash equivalents 0 [1] 0 [2]
Level 2 [Member] | Marketable Investments [Member]    
Assets:    
Fair value of investments [3] $ 16,717 $ 19,970
[1] U.S. based funds of $15.2 million are included in cash and cash equivalents and non-U.S. based funds of $35.3 million are included in marketable investments in the Consolidated Balance Sheets.
[2] U.S. based funds of $23.5 million are included in cash and cash equivalents and non-U.S. based funds of $31.6 million are included in marketable investments in the Consolidated Balance Sheets.
[3] Marketable investments have been initially valued at the transaction price and subsequently valued, at the end of the reporting period, utilizing third party pricing services or other market observable data. The pricing services utilize industry standard valuation methods, including both income and market-based approaches and observable market inputs to determine value. These observable market inputs include reportable trades, benchmark yields, credit spreads, broker/dealer quotes, bids, offers, current spot rates and other industry and economic events.