Document And Entity Information (USD $)	3 Months Ended
	Nov. 30, 2011	Jan. 13, 2012	Feb. 28, 2011
Document and Entity Information [Abstract]
Entity Registrant Name	SIMULATIONS PLUS INC
Document Type	10-Q
Current Fiscal Year End Date	--08-31
Entity Common Stock, Shares Outstanding		15,607,895
Entity Public Float			$ 28,608,254
Amendment Flag	false
Entity Central Index Key	0001023459
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	Nov. 30, 2011
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1