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Cash Equivalents and Investments - Schedule of Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Available-for-sale [Line Items]
Available-for-sale Securities	$ 103,541	$ 93,239
Corporate securities
Available-for-sale [Line Items]
Available-for-sale Securities	58,830	61,385
Municipal Debt Securities [Member]
Available-for-sale [Line Items]
Available-for-sale Securities	13,419	14,377
U.S. Treasury securities [Member]
Available-for-sale [Line Items]
Available-for-sale Securities	21,888	10,205
Certificates of Deposit [Member]
Available-for-sale [Line Items]
Available-for-sale Securities	3,906	3,710
Federal Home Loan Securities [Member]
Available-for-sale [Line Items]
Available-for-sale Securities	$ 5,498	$ 3,562

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