Revenue Recognition - Schedule of Revenues Disaggregated by Service Line (Detail) - USD ($)	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Total services	$ 176,307,000	$ 152,620,000
Patient Management Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	114,810,000	100,449,000
Network Solutions Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	$ 61,497,000	$ 52,171,000