Other Intangible Assets, net (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Sep. 30, 2022	Mar. 31, 2022
Goodwill [Line Items]
Other intangible assets, Total cost	$ 40,283	$ 42,068
Other Intangible Assets, Gross, accumulated amortization	(3,450)	(2,550)
Other intangibles, net	36,833	39,518
Developed Technology [Member]
Goodwill [Line Items]
Gross carrying amount. finite lived intangible assets, cost	$ 27,000	$ 27,000
Gross carrying amount. finite lived intangible assets, weighted average useful life	13 years 1 month 6 days	13 years 7 months 6 days
Gross carrying amount. finite lived intangible assets, Accumulated amortization	$ (3,450)	$ (2,550)
Gross carrying amount, finite lived intangible assets net carrying value	23,550	24,450
In Process Research and Development
Goodwill [Line Items]
Gross carrying amount. infinite lived intangible assets, cost	13,283	15,068
Gross carrying amount, indefinite lived intangible assets net carrying value	$ 13,283	$ 15,068