Document and Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2021	Dec. 23, 2021	Mar. 31, 2021
Details
Registrant CIK	0000775057
Fiscal Year End	--09-30
Registrant Name	ALTEX INDUSTRIES INC
SEC Form	10-K
Period End date	Sep. 30, 2021
Tax Identification Number (TIN)	84-0989164
Number of common stock shares outstanding		12,011,401
Public Float			$ 508,000
Filer Category	Non-accelerated Filer
Current with reporting	Yes
Interactive Data Current	Yes
Voluntary filer	No
Well-known Seasoned Issuer	No
Shell Company	false
Small Business	true
Emerging Growth Company	false
Document Annual Report	true
Document Transition Report	false
Entity File Number	1-9030
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	700 Colorado Blvd
Entity Address, Address Line Two	#273
Entity Address, City or Town	Denver
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80206-4084
Entity Address, Address Description	(Address of principal executive offices)
City Area Code	303
Local Phone Number	265-9312
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY