Common Stock and Stockholders' Equity - Summary of Stock-Based Compensation Expense (Detail) - USD ($)	3 Months Ended			9 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 37,791,000		$ 36,469,000	$ 117,549,000	$ 103,044,000
Restructuring charges	0	$ 12,600,000	0	12,612,000	0
Stock-based compensation
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Restructuring charges	0			493,000
Executive officer
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Acceleration of share-based payment expense	0			9,600,000
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	1,382,000		1,472,000	3,757,000	4,596,000
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	13,117,000		10,960,000	36,228,000	30,214,000
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	12,537,000		15,115,000	37,619,000	42,960,000
Restructuring charges				11,329,000
Sales and marketing | Stock-based compensation
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Restructuring charges				406,000
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 10,755,000		$ 8,922,000	39,945,000	$ 25,274,000
Restructuring charges				1,283,000
General and administrative | Stock-based compensation
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Restructuring charges				$ 87,000