Quarterly report pursuant to Section 13 or 15(d)

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

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Revenue and Accounts Receivable - Schedule of Accounts Receivable by Service Type (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance for doubtful accounts $ (7,967) $ (6,539)
Accounts receivable, net 8,981 10,958
Biopharma Services    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross 4,103 3,746
Clinical Services    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross 12,080 12,205
Discovery Services    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross $ 765 $ 1,546