Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Schedule of Gross Accounts Receivable Balance Concentrations by Major Category (Details)

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Balance Sheet Components - Schedule of Gross Accounts Receivable Balance Concentrations by Major Category (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 36,625 $ 26,017
Medicare    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable 11,204 10,510
Medicaid Or Other Government    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable 555 683
Private Insurance    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable 3,312 4,852
Patient Responsibility    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable 2,856 3,603
Business To Business And Other Receivables    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 18,698 $ 6,369