Revenue Recognition - Schedule of Revenues Disaggregated by Service Line (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation Of Revenue [Line Items]
Total services	$ 195,522,000	$ 177,426,000	$ 385,775,000	$ 353,733,000
Patient Management Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	129,805,000	119,470,000	257,643,000	234,279,000
Network Solutions Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	$ 65,717,000	$ 57,956,000	$ 128,132,000	$ 119,454,000