XML 57 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1
Acquisitions - Additional Information (Detail) - Counsyl Inc [Member]
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jul. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Business Acquisition [Line Items]      
Business acquisition consideration $ 405.9    
Goodwill, working capital adjustment reduction   $ (1.1)  
Intangible assets reduction due to change in valuation of internally developed software   0.9  
Fair value equipment reduction   0.7  
Decrease in deferred tax liability   (0.3)  
Acquired intangible assets $ 292.0    
Acquisition costs   6.8 $ 6.8
Revenue contributed by acquired entity   33.0 52.4
Operating expenses related to acquired entity   $ 46.9 $ 79.9
Measurement Input, Discount Rate [Member]      
Business Acquisition [Line Items]      
Estimated net cash flows, discount rate 12.5    
Developed Screening Processes [Member]      
Business Acquisition [Line Items]      
Acquired intangible assets $ 292.0    
Intangible assets estimated useful lives 12 years    
Agreement and Plan of Merger [Member]      
Business Acquisition [Line Items]      
Effective date of business acquisition Jul. 31, 2018    
Business acquisition consideration $ 405.9    
Cash payment on business acquisition 278.5    
Amount of cash consideration deposited in escrow account $ 5.0    
Agreement and Plan of Merger [Member] | Common Stock [Member]      
Business Acquisition [Line Items]      
Business acquisition, shares issued | shares 2,994,251    
Business acquisition, shares issued, value $ 127.4    
Business acquisition, per share market closing price | $ / shares $ 42.53