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Note 4 - Major Customers (Details)
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Details    
Concentration Risk, Additional Characteristic the Company had three customers who individually accounted for 10% or more of the Company's oil and gas sales and who, in aggregate, accounted for 93% of oil and gas sales  
Concentration Risk, Other Risk the three customers individually accounted for 63%, 17% and 13% of oil and gas sales. In 2020 the Company had three customers who individually accounted for 10% or more of the Company's oil and gas sales and who, in aggregate, accounted for 97% of oil and gas sales the three customers individually accounted for 43%, 41% and 13% of oil and gas sales.