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
Mar. 31, 2016
Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net $ 23,748 $ 19,872
Medicare    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net 7,432 7,441
Medicaid Or Other Government    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net 503 550
Private Insurance    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net 3,907 3,895
Patient Responsibility    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net 2,211 2,060
Business To Business And Other Receivables    
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, net $ 9,695 $ 5,926