0.5% Convertible Senior Notes and Capped Call (Details)	1 Months Ended
	May 31, 2018 USD ($) day $ / shares	Mar. 31, 2022 USD ($)	Apr. 01, 2021 USD ($)	Mar. 31, 2021 USD ($)
Debt Instrument [Line Items]
Accumulated deficit		$ (783,308,000)		$ (587,116,000)
Convertible senior notes, net		$ 497,663,000		449,380,000
Purchase of capped calls	$ 63,200,000
Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Accumulated deficit			$ 54,200,000
Decrease to additional paid in capital			100,100,000
Convertible senior notes, net			$ 45,900,000
Capped Calls
Debt Instrument [Line Items]
Convertible debt, conversion price (in dollars per share) | $ / shares	$ 110.81
Initial cap price (in dollars per share) | $ / shares	$ 173.82
Additional Paid-In Capital | Capped Calls
Debt Instrument [Line Items]
Costs incurred in connection with capped calls	$ 63,200,000
Convertible Debt | Convertible Senior Notes Due 2023
Debt Instrument [Line Items]
Debt instrument face amount	$ 500,250,000
Stated interest rate	0.50%	0.50%
Convertible debt, conversion ratio	9.0244
Convertible debt, conversion price (in dollars per share) | $ / shares	$ 110.81
Debt conversion option	$ 102,500,000
Effective interest rate	5.74%
Issuance costs	$ 11,600,000	$ 2,587,000		$ 4,492,000
Debt issuance costs, equity component	9,200,000
Issuance costs attributable to the equity component	2,400,000
Conversion option	102,500,000
Convertible Debt | Convertible Senior Notes Due 2023, Over-Allotment Option
Debt Instrument [Line Items]
Debt instrument face amount	$ 65,250,000
Convertible Debt | Stock Price Trigger Measurement
Debt Instrument [Line Items]
Threshold trading days | day	20
Threshold consecutive trading days | day	30
Threshold percentage of stock price trigger (less than)	130.00%
Convertible Debt | Notes Price Trigger Measurement
Debt Instrument [Line Items]
Threshold trading days | day	5
Threshold consecutive trading days | day	5
Threshold percentage of stock price trigger (less than)	98.00%