Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Revenue and Accounts Receivable - Schedule of Revenue by Service Type (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Health Care Organization, Receivable and Revenue Disclosures [Line Items]    
Revenue $ 6,966 $ 6,068
Biopharma Services    
Health Care Organization, Receivable and Revenue Disclosures [Line Items]    
Revenue 3,719 3,350
Clinical Services    
Health Care Organization, Receivable and Revenue Disclosures [Line Items]    
Revenue 2,954 2,456
Discovery Services    
Health Care Organization, Receivable and Revenue Disclosures [Line Items]    
Revenue $ 293 $ 262