Document and Entity Information - USD ($)	12 Months Ended
	Aug. 31, 2015	Feb. 28, 2015	Nov. 18, 2014
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, 2015
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	Smaller Reporting Company
Entity Public Float		$ 65,494,887
Entity Common Stock, Shares Outstanding			16,996,001
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2015