Quarterly report pursuant to Section 13 or 15(d)

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

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Balance Sheet Components - Schedule of Net Accounts Receivable Balance Concentrations by Major Category (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net $ 34,699 $ 30,828
Medicare    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net 2,877 7,208
Medicaid Or Other Government    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net 280 410
Private Insurance    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net 1,545 1,832
Patient Responsibility    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net 1,351 2,538
Business To Business And Other Receivables    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net $ 28,646 $ 18,840