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Short-Term and Long-Term Investments - Amortized Cost and Estimated Fair Value of Available-for-Sale Securities by Contractual Maturities (Detail) $ in Thousands | Dec. 31, 2021 USD ($)
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Failed Auction Security [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Due in twenty to forty years, Cost | $ 3,000
Due in twenty to forty years, Estimated Fair Value | 2,639
US Treasury Obligations [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Maturities greater than three months but less than one year, Cost | 45,238
Maturities greater than three months but less than one year, Estimated Fair Value | $ 45,215

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