Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Goodwill
Impairment loss	$ 0	$ 0	$ 0
Proprietary technology
Intangible assets, net of accumulated amortization
Estimated useful lives	5 years
Trade name
Intangible assets, net of accumulated amortization
Estimated useful lives	5 years
Minimum | Client relationships
Intangible assets, net of accumulated amortization
Estimated useful lives	5 years
Maximum | Client relationships
Intangible assets, net of accumulated amortization
Estimated useful lives	9 years