Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2022	Mar. 31, 2021
Income Tax [Line Items]
Increase related to prior tax positions	$ 4.2
Accrued penalties on uncertain tax position	0.0	$ 0.0	$ 0.0
Income tax benefit carryback under CARES Act	$ 35.9
Net operating losses carryback term due to CARES Act	5 years
State Income Tax [Member]
Income Tax [Line Items]
Net operating loss carryforwards		0.9	3.7
Income tax credit		$ 4.3	$ 1.1