Document and Entity Information
Jul. 08, 2021
Document And Entity Information [Line Items]  
Entity Registrant Name SEACHANGE INTERNATIONAL INC
Entity Incorporation State Country Code DE
Amendment Flag false
Entity Central Index Key 0001019671
Document Type 8-K
Document Period End Date Jul. 08, 2021
Entity File Number 001-38828
Entity Tax Identification Number 04-3197974
Entity Address, Address Line One 177 Huntington Avenue
Entity Address, Address Line Two Suite 1703
Entity Address, Address Line Three PMB 73480
Entity Address, City or Town Boston
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02115
City Area Code (978)
Local Phone Number 897-0100
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common Stock, $0.01 Par Value
Trading Symbol SEAC
Security Exchange Name NASDAQ
Series A Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Series A Participating Preferred Stock Purchase Rights
Trading Symbol SEAC
Security Exchange Name NASDAQ