Commitments and Contingencies - Additional Information (Detail) $ in Thousands	Dec. 31, 2019 USD ($) Contracts $ / £
January 2020 through March 2020 [Member]
Commitments And Contingencies [Line Items]
Number of forward exchange contracts | Contracts	3
Forward exchange contracts sold | $	$ 500
Forward exchange contracts exchange rate pounds sterling to US dollar | $ / £	1.3245
April 2020 through June 2020 [Member]
Commitments And Contingencies [Line Items]
Number of forward exchange contracts | Contracts	3
Forward exchange contracts sold | $	$ 500
Forward exchange contracts exchange rate pounds sterling to US dollar | $ / £	1.30
July 2020 through September 2020 [Member]
Commitments And Contingencies [Line Items]
Number of forward exchange contracts | Contracts	3
Forward exchange contracts sold | $	$ 500
Forward exchange contracts exchange rate pounds sterling to US dollar | $ / £	1.28
October 2020 through December 2020 [Member]
Commitments And Contingencies [Line Items]
Number of forward exchange contracts | Contracts	3
Forward exchange contracts sold | $	$ 500
Forward exchange contracts exchange rate pounds sterling to US dollar | $ / £	1.2520