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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)