Other Intangible Assets, net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Indefinite-lived intangible assets
Gross carrying amount. infinite lived intangible assets, cost	$ 27,000
Other intangible assets, Total cost	42,900	$ 14,913
Other Intangible Assets, Gross, accumulated amortization	(750)
Other intangibles, net	42,150	14,913
Developed Technology [Member]
Finite-lived intangible assets
Gross carrying amount. finite lived intangible assets, cost	$ 27,000
Indefinite-lived intangible assets
Gross carrying amount. finite lived intangible assets, weighted average useful life	14 years 7 months 6 days
Gross carrying amount. finite lived intangible assets, Accumulated amortization	$ (750)
Gross carrying amount, finite lived intangible assets net carrying value	26,250
In Process Research and Development
Indefinite-lived intangible assets
Gross carrying amount. infinite lived intangible assets, cost	15,900	14,913
Gross carrying amount, indefinite lived intangible assets net carrying value	$ 15,900	$ 14,913