Document and Entity Information - shares	9 Months Ended
	Feb. 28, 2019	Apr. 11, 2019
Document And Entity Information
Entity Registrant Name	PATRIOT SCIENTIFIC CORP
Entity Central Index Key	0000836564
Document Type	10-Q
Document Period End Date	Feb. 28, 2019
Amendment Flag	false
Current Fiscal Year End Date	--05-31
Is Entity's Reporting Status Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		401,392,948
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019
Entity Small Business	true
Entity Emerging Growth	false