Common Stock and Stock Plans - Summary of Employee Stock Options and Employee Stock Purchase Plan Weighted Average Assumptions (Detail)	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	54.20%	46.40%	49.50%
Risk-free interest rate	4.20%	3.40%	0.40%
Dividend yield	0.00%	0.00%	0.00%
Expected life	5 years	5 years	3 years 2 months 12 days
Market-based Performance Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	56.40%	49.90%	42.50%
Risk-free interest rate	4.40%	3.80%	1.20%
Dividend yield	0.00%	0.00%	0.00%
Expected life	4 years 7 months 6 days	5 years	5 years
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	66.60%	60.50%	42.10%
Risk-free interest rate	5.30%	3.40%	0.10%
Dividend yield	0.00%	0.00%	0.00%
Expected life	6 months	6 months	6 months