Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Impairment of intangible assets	$ 0	$ 0	$ 0
Other direct cost of revenues	2,782,000	$ 218,000	$ 1,231,000
Future amortization expense, year one	3,755,000
Future amortization expense, year two	3,755,000
Future amortization expense, year three	3,755,000
Future amortization expense, year four	3,755,000
Future amortization expense, year five	3,755,000
Future amortization expense, thereafter	$ 34,525,000