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Business and Geographic Information - Geographical Information Attributable to Net Sales (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues From External Customers And Long Lived Assets [Line Items]                      
Net sales $ 30,000 $ 28,400 $ 23,800 $ 32,300 $ 29,600 $ 29,700 $ 33,700 $ 31,200 $ 114,537 $ 124,243 $ 118,217
Point of destination                      
Revenues From External Customers And Long Lived Assets [Line Items]                      
Net sales                 114,537 124,243 118,217
United States | Point of destination                      
Revenues From External Customers And Long Lived Assets [Line Items]                      
Net sales                 107,712 114,186 108,773
Canada | Point of destination                      
Revenues From External Customers And Long Lived Assets [Line Items]                      
Net sales                 4,423 7,257 6,436
Mexico | Point of destination                      
Revenues From External Customers And Long Lived Assets [Line Items]                      
Net sales                 431 922 1,438
Other | Point of destination                      
Revenues From External Customers And Long Lived Assets [Line Items]                      
Net sales                 $ 1,971 $ 1,878 $ 1,570