Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Schedule of Gross Accounts Receivable Balance Concentrations by Major Category (Details)

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Summary of Significant Accounting Policies - Schedule of Gross Accounts Receivable Balance Concentrations by Major Category (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 39,360 $ 26,017
Gross accounts receivable, percentage 100.00% 100.00%
Medicare    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 12,500 $ 10,510
Gross accounts receivable, percentage 31.80% 40.40%
Medicaid Or Other Government    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 617 $ 683
Gross accounts receivable, percentage 1.60% 2.60%
Private Insurance    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 3,475 $ 4,852
Gross accounts receivable, percentage 8.80% 18.60%
Patient Responsibility    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 3,227 $ 3,603
Gross accounts receivable, percentage 8.20% 13.90%
Business To Business And Other Receivables    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 19,541 $ 6,369
Gross accounts receivable, percentage 49.60% 24.50%