DEI Document - shares	9 Months Ended
	Sep. 30, 2015	Oct. 27, 2015	Dec. 31, 2014
DEI [Abstract]
Common Stock, Shares, Issued	36,916,000		29,198,000
Entity Registrant Name	Radisys Corporation
Entity Central Index Key	0000873044
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		36,915,821
Common Stock, Shares, Outstanding	36,916,000		29,198,000