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Schedule of Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | $ 120,498 | $ 140,377
Available-for-sale marketable securities, Unrealized Gain | 58 | 249
Available-for-sale marketable securities, Unrealized (Loss) | (9,888) | (8,170)
Available-for-sale marketable securities, Fair Market Value | 110,668 | 132,456
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 78,320 | 87,538
U.S. Treasury Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 45,305 | 45,725
Available-for-sale marketable securities, Unrealized Gain | 0 | 14
Available-for-sale marketable securities, Unrealized (Loss) | (4,742) | (3,931)
Available-for-sale marketable securities, Fair Market Value | 40,563 | 41,808
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 40,563 | 35,080
Corporate Debt Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 39,750 | 56,458
Available-for-sale marketable securities, Unrealized Gain | 58 | 201
Available-for-sale marketable securities, Unrealized (Loss) | (4,767) | (3,925)
Available-for-sale marketable securities, Fair Market Value | 35,041 | 52,734
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 30,671 | 44,263
Commercial Paper |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 0 | 1,633
Available-for-sale marketable securities, Unrealized Gain | 0 | 34
Available-for-sale marketable securities, Unrealized (Loss) |  | 0
Available-for-sale marketable securities, Fair Market Value | 0 | 1,667
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses |  | 0
U.S. Government Agency Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 3,928 | 4,898
Available-for-sale marketable securities, Unrealized Gain |  | 0
Available-for-sale marketable securities, Unrealized (Loss) | (23) | (6)
Available-for-sale marketable securities, Fair Market Value | 3,905 | 4,892
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 3,905 | 4,892
Debt Mutual Funds |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 9,060 | 9,081
Available-for-sale marketable securities, Unrealized Gain |  | 0
Available-for-sale marketable securities, Unrealized (Loss) | (356) | (308)
Available-for-sale marketable securities, Fair Market Value | 8,704 | 8,773
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 3,181 | 3,303
Certificates of Deposit and Time Deposits |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 21,688 | 21,772
Available-for-sale marketable securities, Unrealized Gain |  | 0
Available-for-sale marketable securities, Unrealized (Loss) |  | 0
Available-for-sale marketable securities, Fair Market Value | 21,688 | 21,772
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses |  | 0
Non-U.S. Government Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 767 | 810
Available-for-sale marketable securities, Unrealized Gain |  | 0
Available-for-sale marketable securities, Unrealized (Loss) |  | 0
Available-for-sale marketable securities, Fair Market Value | 767 | 810
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses |  | $ 0

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