Segment Reporting - Schedule of Percentages of Revenues Attributable to Patient Management and Network Solutions Services (Detail) (Product Concentration Risk [Member], Sales Revenue, Services, Net [Member])	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Revenue, Major Customer [Line Items]
Patient management and network solutions services, revenues	100.00%	100.00%	100.00%
Patient Management Services [Member]
Revenue, Major Customer [Line Items]
Patient management and network solutions services, revenues	54.50%	51.90%	51.50%
Network Solutions Services [Member]
Revenue, Major Customer [Line Items]
Patient management and network solutions services, revenues	45.50%	48.10%	48.50%