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Restructuring and Related Charges - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Cost And Reserve [Line Items]      
Restructuring and related charges $ 4,358,000 $ 1,881,000 $ 124,000
Non-cash restructuring charges related to share-based compensation 800,000    
Continuing Operations      
Restructuring Cost And Reserve [Line Items]      
Restructuring and related charges 3,618,000    
2019 Restructuring Plan | Continuing Operations      
Restructuring Cost And Reserve [Line Items]      
Restructuring and related charges 475,000 $ 1,900,000  
Restructuring charges incurred 2,400    
2020 COVID Restructuring Plan | Continuing Operations      
Restructuring Cost And Reserve [Line Items]      
Restructuring and related charges 816,000    
Restructuring charges incurred 800,000    
Total annualized savings 6,000,000.0    
2020 Restructuring Plan | Continuing Operations      
Restructuring Cost And Reserve [Line Items]      
Restructuring and related charges 2,327,000    
Restructuring charges incurred 3,100,000    
Total annualized savings $ 6,700,000