Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Schedule of Cash and Cash Equivalents (Detail)

v3.22.1
Financial Instruments - Schedule of Cash and Cash Equivalents (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Schedule Of Available For Sale Securities [Line Items]      
Total Cash and Debt Securities $ 237,553 $ 254,722  
Total Fair Value, Cash and Debt Securities 237,553 254,722  
Cash and cash equivalents 237,553 254,722 $ 237,553
Cash [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cash and cash equivalents 236,524 253,693  
Fair Value, Cash 236,524 253,693  
Level 1 [Member] | Money Market Funds [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cash and cash equivalents 1,029 1,029  
Cash and cash equivalents gross before unrealized losses 1,029 1,029  
Fair Value, Cash $ 1,029 $ 1,029