Document and Entity Information (USD $)	12 Months Ended
	Dec. 27, 2014	Feb. 09, 2015	Jun. 28, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	IROBOT CORP
Entity Central Index Key	0001159167
Document Type	10-K
Document Period End Date	Dec. 27, 2014
Amendment Flag	false
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-27
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 1,160,000,000
Entity Common Stock, Shares Outstanding		29,672,165