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, 2017	Mar. 31, 2016	Mar. 31, 2015
Revenue, Major Customer [Line Items]
Percentage of revenues	100.00%	100.00%	100.00%
Patient Management Services [Member]
Revenue, Major Customer [Line Items]
Percentage of revenues	55.60%	55.10%	54.50%
Network Solutions Services [Member]
Revenue, Major Customer [Line Items]
Percentage of revenues	44.40%	44.90%	45.50%