Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.7.0.1
Document and Entity Information - shares
6 Months Ended
Jul. 31, 2017
Sep. 01, 2017
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jul. 31, 2017  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Trading Symbol SEAC  
Entity Registrant Name SEACHANGE INTERNATIONAL INC  
Entity Central Index Key 0001019671  
Current Fiscal Year End Date --01-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   35,486,383