Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Employee Benefits
Minimum length of service for participation	30 days
Maximum annual contribution as percentage of compensation	25.00%
Company matching contribution percent	4.00%
401(k) Plan expense	$ 1.6	$ 1.4	$ 1.6