Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2019	May 21, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	AGILYSYS INC
Entity Central Index Key	0000078749
Current Fiscal Year End Date	--03-31
Entity Filer Category	Accelerated Filer
Document Type	10-K
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		23,495,028
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float		$ 441,239,714
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false