Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Lower range of exercise of stock options and warrants (in usd per share)	$ 0	$ 8.75	$ 7.90
Upper range of exercise of stock options and warrants (in usd per share)	0	8.75	12.15
Additional Paid In Capital
Lower range of exercise of stock options and warrants (in usd per share)	0	8.75	7.90
Upper range of exercise of stock options and warrants (in usd per share)	$ 0	$ 8.75	$ 12.15

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration