Quarterly report pursuant to Section 13 or 15(d)

Organization, Description of Business, Basis of Presentation, Acquisitions and Recent Accounting Pronouncements - Additional Information (Detail)

v3.4.0.3
Organization, Description of Business, Basis of Presentation, Acquisitions and Recent Accounting Pronouncements - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Oct. 09, 2015
Mar. 31, 2016
Mar. 31, 2015
Business Acquisition [Line Items]      
Revenue   $ 6,068 $ 4,370
Response Genetics, Inc.      
Business Acquisition [Line Items]      
Consideration transferred $ 12,900    
Consideration transferred, amount paid in cash $ 7,500    
Consideration transferred, common stock paid (in shares) 788,584    
Consideration transferred, common stock value $ 5,400    
Response Genetics, Inc.      
Business Acquisition [Line Items]      
Revenue   $ 2,163