Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Additional Information (Detail)

v3.10.0.1
Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
1 Months Ended
Aug. 31, 2017
Dec. 31, 2015
Dec. 31, 2018
Dec. 10, 2018
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]            
Goodwill     $ 197,892,000   $ 147,019,000 $ 147,019,000
Genoptix            
Finite-Lived Intangible Assets [Line Items]            
Goodwill     50,900,000 $ 50,873,000    
Intangible assets acquired     71,800,000      
Clarient            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets acquired   $ 84,000,000.0        
Restricted Stock | Ascend Genomics            
Finite-Lived Intangible Assets [Line Items]            
Stock issued for purchase of assets 450,000          
Customer Relationships | Genoptix            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets acquired     56,600,000      
Intangible assets, useful life   15 years        
Customer Relationships | Ascend Genomics            
Finite-Lived Intangible Assets [Line Items]            
Finite-lived intangible assets acquired $ 4,100,000          
Customer Relationships | Clarient            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets acquired   $ 81,000,000.0        
Trade Names | Genoptix            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets acquired     700,000      
Intangible assets, useful life   2 years        
Trade Names | Clarient            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets acquired   $ 3,000,000.0        
Noncompete Agreements | Ascend Genomics            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets, useful life 2 years          
Trademarks | Genoptix            
Finite-Lived Intangible Assets [Line Items]            
Assets acquired     14,600,000      
Clinical Services            
Finite-Lived Intangible Assets [Line Items]            
Goodwill     178,825,000   127,952,000  
Pharma Services            
Finite-Lived Intangible Assets [Line Items]            
Goodwill     $ 19,067,000   $ 19,067,000