Common Stock and Stockholders' Equity - Schedule of Cost of Revenue, Research and Development, Sales and Marketing and General and Administrative Expenses (Detail) - USD ($)	3 Months Ended			12 Months Ended
	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense				$ 153,039,000	$ 135,143,000	$ 99,536,000
Employee terminations and other costs	$ 0	$ 12,600,000	$ 0	12,612,000	0
Stock-based compensation
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Employee terminations and other costs				493,000
Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Acceleration of share-based payment expense				9,600,000
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense				5,042,000	5,939,000	5,303,000
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense				48,355,000	40,964,000	31,703,000
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense				48,986,000	54,695,000	43,548,000
Employee terminations and other costs				11,329,000
Sales and marketing | Stock-based compensation
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Employee terminations and other costs				406,000
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense				50,656,000	$ 33,545,000	$ 18,982,000
Employee terminations and other costs				1,283,000
General and administrative | Stock-based compensation
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Employee terminations and other costs				$ 87,000