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Acquisitions - Fair Value of Assets Acquired and Liabilities Assumed (Details) - Senscient, Inc. - USD ($)
Jun. 30, 2017
Sep. 19, 2016
Business Acquisition [Line Items]    
Current assets (including cash of $10.6 million)   $ 5,900
Property, plant and equipment and other noncurrent assets   300
Goodwill $ 10,500,000 10,500
Total assets acquired   21,100
Total liabilities assumed   2,000
Net assets acquired   19,100
Cash   700
Technology-Based Intangible Assets    
Business Acquisition [Line Items]    
Intangible assets   1,600
Customer-Related Intangible Assets    
Business Acquisition [Line Items]    
Intangible assets   $ 2,800