Business Risk and Credit Risk Concentration Involving Cash - Additional Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
Mar. 31, 2020 USD ($) Customer	Mar. 31, 2019 Customer	Mar. 31, 2020 USD ($) Customer	Mar. 31, 2019 Customer
Risks And Uncertainties [Abstract]
Revenue from number of customers \| Customer	1	1	1	1
Federal Deposit Insurance Corporation amount per depositor \| $	$ 250		$ 250

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

No definition available.

Name:	us-gaap_CashFDICInsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant