Revenue Recognition - Schedule of Revenues Disaggregated by Service Line (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Total services	$ 164,508,000	$ 141,506,000	$ 474,871,000	$ 407,134,000
Patient Management Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	107,711,000	96,554,000	312,829,000	272,025,000
Network Solutions Services [Member]
Disaggregation Of Revenue [Line Items]
Total services	$ 56,797,000	$ 44,952,000	$ 162,042,000	$ 135,109,000