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Interim Financial Statements - Additional Information (Detail)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Facility
Jan. 01, 2019
USD ($)
Jan. 01, 2018
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Number of manufacturing facilities | Facility 51    
Cumulative effect of new accounting principle of adoption   $ (51) $ 16
Accounting Standards Update 2016-02      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative effect of new accounting principle of adoption   $ 100