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Organization and Significant Accounting Policies - Additional Information (Detail)
$ in Millions
 3 Months Ended
Dec. 31, 2021
USD ($)
Mar. 31, 2022
USD ($)
subsidiary
May 02, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Number of wholly owned Irish subsidiaries | subsidiary   2  
Accounting Standards Update [Extensible List] Accounting Standards Update 2020-06    
Convertible senior notes $ 335.1 $ 377.7  
Accumulated deficit (635.8) (547.4)  
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Convertible senior notes 42.2    
Deferred tax liabilities 9.9    
Additional Paid in Capital 106.8    
Accumulated deficit 74.5    
2.25% Convertible senior notes due 2024      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Interest rate percentage     2.25%
Convertible senior notes $ 335.1 $ 377.7