Document and Entity Information	3 Months Ended
	Dec. 31, 2019 shares
Document And Entity Information
Entity Registrant Name	PATRIOT TRANSPORTATION HOLDING, INC.
Entity Central Index Key	0001616741
Document Type	10-Q
Document Period End Date	Dec. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Entity Incorporation State Country	FL
Entity File Number	001-36605
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business Filer	true
Emerging Growth Company	false
Interactive data current	Yes
Shell Company	false
Security title	Common stock, $.10 par value
Trading symbol	PATI
Name of exchange on which registered	NASDAQ
Entity Common Stock, Shares Outstanding	3,351,329
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2020