Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	May 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Commitment And Contingencies [Line Items]
Non-cancelable operating leases expiration month and year		2031-06
Rent expense		$ 5.3	$ 2.3	$ 1.5
Strategic partnership agreement period		10 years
Online bill payment products expiration month and year		2027-06
Service agreement with existing financial institution partner expanded period	5 years
Agreed amount of payment to partner under service agreement	$ 12.0
Amount payable to partner under service agreement		$ 10.0
Sales and Marketing Expenses
Commitment And Contingencies [Line Items]
Strategic partnership agreement expenses		$ 2.0	$ 2.3	$ 2.3