Income Taxes (Narrative) (Details)	12 Months Ended
Jun. 30, 2021
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards expiration date	Jun. 30, 2021
Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards expiration date	Jun. 30, 2037

Expiration date of each operating loss carryforward included in operating loss carryforward, in YYYY-MM-DD format.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319

Name:	us-gaap_OperatingLossCarryforwardsExpirationDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration