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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)

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