Revenue Recognition - Schedule of Revenues Disaggregated by Service Line (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Total services	$ 177,426,000	$ 157,743,000	$ 353,733,000	$ 310,363,000
Patient Management Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	119,470,000	104,669,000	234,279,000	205,118,000
Network Solutions Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	$ 57,956,000	$ 53,074,000	$ 119,454,000	$ 105,245,000