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Available-for-Sale Marketable Securities in Unrealized Position (Detail) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 Months, Fair Value $ 24,685 $ 28,094
Less than 12 Months, Unrealized Loss (523) (876)
12 Months or Longer, Fair Value 38,840 32,828
12 Months or Longer, Unrealized Loss (1,818) (1,961)
Total, Fair Value 63,525 60,922
Total, Unrealized Loss (2,341) (2,837)
Corporate debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 Months, Fair Value 10,860 16,500
Less than 12 Months, Unrealized Loss (275) (544)
12 Months or Longer, Fair Value 23,207 20,050
12 Months or Longer, Unrealized Loss (1,058) (1,159)
Total, Fair Value 34,067 36,550
Total, Unrealized Loss (1,333) (1,703)
United States government agency securities    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 Months, Fair Value 12,539 9,869
Less than 12 Months, Unrealized Loss (189) (234)
12 Months or Longer, Fair Value 13,913 11,362
12 Months or Longer, Unrealized Loss (519) (584)
Total, Fair Value 26,452 21,231
Total, Unrealized Loss (708) (818)
Mortgage-backed securities    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 Months, Fair Value 1,286 1,725
Less than 12 Months, Unrealized Loss (59) (98)
12 Months or Longer, Fair Value 1,720 1,416
12 Months or Longer, Unrealized Loss (241) (218)
Total, Fair Value 3,006 3,141
Total, Unrealized Loss $ (300) $ (316)