Document and Entity Information - shares	9 Months Ended
	Dec. 31, 2018	Jan. 25, 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-Q
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		23,535,117