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Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Finite-lived intangible assets    
Gross Carrying Amount $ 29,993 $ 30,648
Accumulated Amortization (16,207) (15,532)
Indefinite-lived intangible assets Goodwill 27,048 27,840
Patents [Member]    
Finite-lived intangible assets    
Gross Carrying Amount 4,806 4,806
Accumulated Amortization (4,806) (4,806)
Land Use Rights [Member]    
Finite-lived intangible assets    
Gross Carrying Amount 1,078 1,128
Accumulated Amortization (433) (331)
Trademarks [Member]    
Finite-lived intangible assets    
Gross Carrying Amount 1,653 1,718
Accumulated Amortization (1,366) (1,358)
Technology [Member]    
Finite-lived intangible assets    
Gross Carrying Amount 6,994 7,185
Accumulated Amortization (1,954) (1,708)
Customer Relationships [Member]    
Finite-lived intangible assets    
Gross Carrying Amount 15,462 15,811
Accumulated Amortization $ (7,648) $ (7,329)