XML 47 R35.htm IDEA: XBRL DOCUMENT v3.10.0.1
Percentage of Net Revenue and Total Accounts Receivable (Detail)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Sales Revenue, Net | Payor A [Member]          
Accounts Receivable And Net Revenue [Line Items]          
Concentration Risk, Percentage 0.00% [1] 13.40% 0.00% [1] 13.10%  
Sales Revenue, Net | Payor B [Member]          
Accounts Receivable And Net Revenue [Line Items]          
Concentration Risk, Percentage 15.40% 17.50% 13.70% 20.80%  
Sales Revenue, Net | Payor C [Member]          
Accounts Receivable And Net Revenue [Line Items]          
Concentration Risk, Percentage 0.00% [1] 12.00% 0.00% [1] 11.90%  
Sales Revenue, Net | Payor D [Member]          
Accounts Receivable And Net Revenue [Line Items]          
Concentration Risk, Percentage 0.00% [1] 12.10% 10.20% 12.40%  
Accounts Receivable | Payor E [Member]          
Accounts Receivable And Net Revenue [Line Items]          
Concentration Risk, Percentage     21.60%   23.80%
Accounts Receivable | Payor F [Member]          
Accounts Receivable And Net Revenue [Line Items]          
Concentration Risk, Percentage     32.50%   30.50%
Accounts Receivable | Payor G [Member]          
Accounts Receivable And Net Revenue [Line Items]          
Concentration Risk, Percentage     14.10%   0.00% [2]
[1] Less than 10% of total net revenues
[2] Less than 10% of receivables