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, 2021	Mar. 31, 2020	Mar. 31, 2019
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	66.70%	65.30%	61.80%
Network Solutions Services [Member]
Revenue, Major Customer [Line Items]
Percentage of revenues	33.30%	34.70%	38.20%