DEI Document	3 Months Ended
	Mar. 31, 2015	Apr. 28, 2015	Dec. 31, 2014
DEI [Abstract]
Common Stock, Shares, Issued	36,157,000		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	Mar. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		36,721,875
Common Stock, Shares, Outstanding	36,157,000		29,198,000