Quarterly report pursuant to Section 13 or 15(d)

Revenue and Accounts Receivable - Schedule of Accounts Receivable by Service Type (Detail)

v3.4.0.3
Revenue and Accounts Receivable - Schedule of Accounts Receivable by Service Type (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance for doubtful accounts $ (664) $ (664)
Accounts receivable, net 8,449 6,621
Biopharma Services    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross 3,334 3,238
Clinical Services    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross 5,432 3,733
Discovery Services    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross $ 347 $ 314