Document and Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2017	Dec. 01, 2017	Mar. 31, 2017
Document Information [Line Items]
Entity Registrant Name	PANHANDLE OIL & GAS INC
Entity Central Index Key	0000315131
Document Type	10-K
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--09-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 297,276,077
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		16,678,016
Class B Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0