Note 9 - Supplemental Financial Data - Oil and Gas Producing Activities (Unaudited): Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities (Details)	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Details
Net Proved Developed And Undeveloped Reserves	1,100	2,400	3,700
Proved Developed And Undeveloped Reserves, Revisions of previous estimates	(700)	(900)
Proved Developed And Undeveloped Reserve, Production	(600)	(400)

Represents the Proved Developed And Undeveloped Reserves, Revisions of previous estimates, as of the indicated date.

No definition available.

Name:	fil_ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimates
Namespace Prefix:	fil_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant