Note 7 - Income Taxes - Changes in the Valuation Allowance (Details) - USD ($)	12 Months Ended
Jun. 30, 2020	Jun. 30, 2019
Balance, beginning of year	$ (2,382,087)	$ (2,710,628)
Decrease (Increase) in valuation allowance	(61,948)	328,541
Balance, end of year	$ (2,444,035)	$ (2,382,087)

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant