Document and Entity Information	6 Months Ended
	Jun. 30, 2013	Jul. 26, 2013
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	SMSI
Entity Registrant Name	SMITH MICRO SOFTWARE INC
Entity Central Index Key	0000948708
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		37,043,264