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Available-for-Sale Marketable Securities in Unrealized Position (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | $ 6,563 | $ 28,094
Less than 12 Months, Unrealized Loss | (38) | (876)
12 Months or Greater, Fair Value | 43,285 | 32,828
12 Months or Greater, Unrealized Loss | (1,177) | (1,961)
Total, Fair Value | 49,848 | 60,922
Total, Unrealized Loss | (1,215) | (2,837)
Corporate debt securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | 1,466 | 16,500
Less than 12 Months, Unrealized Loss | (12) | (544)
12 Months or Greater, Fair Value | 29,647 | 20,050
12 Months or Greater, Unrealized Loss | (626) | (1,159)
Total, Fair Value | 31,113 | 36,550
Total, Unrealized Loss | (638) | (1,703)
United States government agency securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | 4,855 | 9,869
Less than 12 Months, Unrealized Loss | (25) | (234)
12 Months or Greater, Fair Value | 10,991 | 11,362
12 Months or Greater, Unrealized Loss | (289) | (584)
Total, Fair Value | 15,846 | 21,231
Total, Unrealized Loss | (314) | (818)
Mortgage-backed securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | 242 | 1,725
Less than 12 Months, Unrealized Loss | (1) | (98)
12 Months or Greater, Fair Value | 2,647 | 1,416
12 Months or Greater, Unrealized Loss | (262) | (218)
Total, Fair Value | 2,889 | 3,141
Total, Unrealized Loss | $ (263) | $ (316)

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