Note 3 - Income Taxes - Valuation Allowance Activity (Details) - USD ($)	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Balance at Beginning of Year	$ 0	$ 47,014
Income Tax Benefit	0	(5,235)
Reversal for State NOL Expiration and Utilization	0	(41,779)
Balance at End of Year	$ 0	$ 0

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=121826272&loc=d3e32537-109319

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