Short-Term and Long-Term Investments - Summary of Investment (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Available-for-sale	$ 191,050	$ 182,418
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Available-for-sale	20,003	45,215
Other Long-term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Available-for-sale	2,536	2,639
Auction Rate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Available-for-sale	2,536	2,639
Auction Rate Securities [Member] | Other Long-term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Available-for-sale	2,536	2,639
Estimate of Fair Value Measurement [Member] | Cash and Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Available-for-sale	119,506	94,282
Estimate of Fair Value Measurement [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Available-for-sale	20,003	45,215
Estimate of Fair Value Measurement [Member] | Other Long-term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Available-for-sale	2,536	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]
Debt Securities, Available-for-sale	2,536	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]
Debt Securities, Available-for-sale	119,506	94,282
Estimate of Fair Value Measurement [Member] | US Treasury Obligations [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Available-for-sale	20,003	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]
Debt Securities, Available-for-sale	$ 71,544	$ 88,136