DOCUMENT AND ENTITY INFORMATION (USD $)	12 Months Ended
	Jan. 31, 2013	Apr. 04, 2013	Jul. 31, 2012
Entity Registrant Name	SEACHANGE INTERNATIONAL INC
Entity Central Index Key	0001019671
Current Fiscal Year End Date	--01-31
Entity Filer Category	Accelerated Filer
Trading Symbol	seac
Entity Common Stock, Shares Outstanding		32,612,436
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 31, 2013
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2013
Entity Well-Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 243,195,410