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Percentage of Net Revenue and Total Accounts Receivable (Detail)
3 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Mar. 31, 2017
Mar. 31, 2016
Sales Revenue, Net | Governmental - Medicare/Medi-Cal        
Accounts Receivable And Net Revenue [Line Items]        
Concentration Risk, Percentage 72.10% 23.60% 18.80% 29.80%
Sales Revenue, Net | L.A Care        
Accounts Receivable And Net Revenue [Line Items]        
Concentration Risk, Percentage [1] 14.50% 13.10% 15.70%
Sales Revenue, Net | Allied Physicians [Member]        
Accounts Receivable And Net Revenue [Line Items]        
Concentration Risk, Percentage [1] 14.10% 8.50% 0.00%
Sales Revenue, Net | Health Net        
Accounts Receivable And Net Revenue [Line Items]        
Concentration Risk, Percentage     6.80% 9.90%
Accounts Receivable | Governmental - Medicare/Medi-Cal        
Accounts Receivable And Net Revenue [Line Items]        
Concentration Risk, Percentage 28.50%   20.50% 39.30%
Accounts Receivable | Allied Physicians [Member]        
Accounts Receivable And Net Revenue [Line Items]        
Concentration Risk, Percentage 13.80%   12.80% 15.80%
[1] Represents less than 10%