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Short-Term and Long-Term Investments - Summary of Investment (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	$ 182,098	$ 182,418
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	19,949	45,215
Other Long-term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	2,552	2,639
Auction Rate Securities [Member] | Other Long-term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	2,552	2,639
Estimate of Fair Value Measurement [Member] | Cash and Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	120,217	94,282
Estimate of Fair Value Measurement [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	19,949	45,215
Estimate of Fair Value Measurement [Member] | Other Long-term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	2,552	2,639
Estimate of Fair Value Measurement [Member] | Auction Rate Securities [Member] | Other Long-term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	2,552	2,639
Estimate of Fair Value Measurement [Member] | Money Market Funds [Member] | Cash and Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	120,217	94,282
Estimate of Fair Value Measurement [Member] | US Treasury Obligations [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	19,949	45,215
Portion at Other than Fair Value Measurement [Member] | Cash [Member] | Cash and Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	$ 61,881	$ 88,136

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