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Product and Business Acquisitions - Additional Information (Detail)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 08, 2018
USD ($)
Jan. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Business
Productline
Dec. 31, 2017
USD ($)
Business Acquisition [Line Items]        
Business combination, cash consideration     $ 19,851 $ 81,896
Business combination, number of businesses acquired | Business     4  
Business combination, cash acquired     $ (1,600)  
Business combination, fair value of Company's pre-existing ownership position     (2,044)  
Business combination, liabilities assumed     1,750  
Business combination, captalized cost in asset acquisition     108  
Business combination, total consideration     27,283 92,555
Business combination, preliminary allocation of purchase price, inventory     5,461  
Business combination, preliminary allocation of purchase price, goodwill     25,790 22,184
Business combination, preliminary allocation of purchase price, working capital     122 14,679
Business combination, preliminary allocation of purchase price, property, plant and equipment     27 512
Business combination, preliminary allocation of purchase price, deferred tax assets     1,326  
Business combination, deferred consideration paid       10,659
business combination, reduction in goodwill       348
Product Lines Acquisition        
Business Acquisition [Line Items]        
Business combination, contingent combination from one of the asset acquisitions     12,500  
E.I DuPont et Nemours and Company and BayerCropScience | Product Lines Acquisition        
Business Acquisition [Line Items]        
Business combination, cash consideration     21,335  
Business combination, captalized cost in asset acquisition     108  
Business combination, preliminary allocation of purchase price, inventory     $ 5,378  
Business combination, number of product lines acquired | Productline     3  
E.I DuPont et Nemours and Company and BayerCropScience | Product Lines Acquisition | Subsequent Event        
Business Acquisition [Line Items]        
Business combination, cash consideration   $ 3,530    
TyraTech Inc.        
Business Acquisition [Line Items]        
Business combination, cash consideration $ 2,154      
Business combination, liabilities assumed $ 1,750      
Business combination, preliminary allocation purchase price of intangible assets     $ 436  
Business combination, preliminary allocation of purchase price, goodwill     3,954  
Business combination, preliminary allocation of purchase price, working capital     205  
Business combination, preliminary allocation of purchase price, property, plant and equipment     27  
Business combination, preliminary allocation of purchase price, deferred tax assets     1,326  
Business combination, percentage of ownership 65.62%      
Business combination, percentage of pre-existing ownership 34.38%      
Business combination, recorded gain on step up the value of ownership     $ 1,463  
E.I DuPont et Nemours and Company | Product Lines Acquisition        
Business Acquisition [Line Items]        
Business combination, number of product lines acquired | Productline     1  
Bayer | Product Lines Acquisition        
Business Acquisition [Line Items]        
Business combination, number of product lines acquired | Productline     2  
Product Registrations and Product Rights        
Business Acquisition [Line Items]        
Business combination, preliminary allocation purchase price of intangible assets     $ 12,720 55,127
Trade Names, Trademarks and Patents        
Business Acquisition [Line Items]        
Business combination, preliminary allocation purchase price of intangible assets     2,934 9,500
Customer Lists        
Business Acquisition [Line Items]        
Business combination, preliminary allocation purchase price of intangible assets     $ 739 $ 3,700