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Leases - Components of Lease Expense included in Consolidated Statement of Income (Loss) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Lessor Lease Description [Line Items]    
Total operating lease expense $ 2,545 $ 3,881
Cost of Sales [Member]    
Lessor Lease Description [Line Items]    
Total operating lease expense 113 64
Selling, General and Administrative Expenses [Member]    
Lessor Lease Description [Line Items]    
Total operating lease expense 1,311 1,400
Research and Development Expenses [Member]    
Lessor Lease Description [Line Items]    
Total operating lease expense $ 1,121 $ 2,417