Revenue Recognition - Schedule of Revenues Disaggregated by Service Line (Detail) - USD ($)	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Total services	$ 190,253,000	$ 176,307,000
Patient Management Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	127,838,000	114,810,000
Network Solutions Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	$ 62,415,000	$ 61,497,000