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Document and Entity Information - USD ($)
 12 Months Ended
Mar. 31, 2020
May 20, 2020
Cover [Abstract]    
Document Type 10-K  
Amendment Flag false  
Document Period End Date Mar. 31, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus FY  
Entity Registrant Name AGILYSYS INC  
Entity Central Index Key 0000078749  
Entity Current Reporting Status Yes  
Current Fiscal Year End Date --03-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   23,400,816
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company false  
Title of 12(b) Security Common Shares, without par value  
Trading Symbol AGYS  
Security Exchange Name NASDAQ  
Document Annual Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Entity File Number 0-5734  
Entity Incorporation, State or Country Code OH  
Entity Tax Identification Number 34-0907152  
Entity Address, Address Line One 1000 Windward Concourse  
Entity Address, Address Line Two Suite 250  
Entity Address, City or Town Alpharetta  
Entity Address, State or Province GA  
Entity Address, Postal Zip Code 30005  
City Area Code 770  
Local Phone Number 810-7800  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer No  
Entity Public Float   $ 375,276,893
Documents Incorporated by Reference [Text Block]

Portions of the registrant's definitive Proxy Statement to be used in connection with its 2020 Annual Meeting of Shareholders are incorporated by reference into Part III of this Form 10-K