Funds Held for Customers - Additional Information (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Funds Held For Customers [Line Items]
Amortized Cost	$ 626,740,000	$ 437,979,000
Fair value	$ 628,784,000	$ 438,407,000
Debt securities percentage mature within one year	100.00%	100.00%
Short term marketable debt realized gains or losses	$ 0	$ 0	$ 0
Accrued Interest Receivable
Funds Held For Customers [Line Items]
Amortized Cost	2,900,000	1,900,000
Fair value	$ 2,900,000	$ 1,900,000