Document and Entity Information - USD ($)	12 Months Ended
	Aug. 31, 2017	Nov. 14, 2017	Feb. 28, 2017
Document And Entity Information
Entity Registrant Name	SIMULATIONS PLUS INC
Entity Central Index Key	0001023459
Document Type	10-K
Document Period End Date	Aug. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--08-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 106,370,782
Entity Common Stock, Shares Outstanding		17,284,792
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2017