Percentage of Net Revenue and Total Accounts Receivable (Detail)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Sales Revenue, Net | Governmental - Medicare/Medi-Cal
Accounts Receivable And Net Revenue [Line Items]
Concentration Risk, Percentage	18.80%	29.80%
Sales Revenue, Net | L.A Care
Accounts Receivable And Net Revenue [Line Items]
Concentration Risk, Percentage	13.10%	15.70%
Sales Revenue, Net | Allied Physicians [Member]
Accounts Receivable And Net Revenue [Line Items]
Concentration Risk, Percentage	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	20.50%	39.30%
Accounts Receivable | Allied Physicians [Member]
Accounts Receivable And Net Revenue [Line Items]
Concentration Risk, Percentage	12.80%	15.80%