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Short-Term and Long-Term Investments - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Unrealized Losses On Short Term And Long Term Investments [Line Items] |  |
Minimum period for which failed auction securities been in unrealized loss position |  | 12 months
Short Term Investments | $ 45,215,000 | $ 50,166,000
Failed Auction Security [Member] |  |
Unrealized Losses On Short Term And Long Term Investments [Line Items] |  |
Amortized cost of securities | $ 3,000,000 | 3,000,000
Period for which failed auction securities been in unrealized loss position | exceeds 12 months |
Estimated Fair Value | $ 2,639,000 | $ 2,517,000

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