Document and Entity Information - shares	9 Months Ended
	May 31, 2019	Jul. 10, 2019
Document And Entity Information
Entity Registrant Name	SIMULATIONS PLUS INC
Entity Central Index Key	0001023459
Document Type	10-Q
Document Period End Date	May 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--08-31
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		17,531,487
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019
Entity small business	false
Entity Emerging Growth	false
Entity Interactive data	Yes
Incorporation state	CA
Entity file number	001-32046
Entity shell company	false