v3.19.1
Document and Entity Information - shares
3 Months Ended
Mar. 30, 2019
Apr. 27, 2019
Entity Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol IRBT  
Entity Registrant Name IROBOT CORP  
Entity Central Index Key 0001159167  
Current Fiscal Year End Date --12-28  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   28,054,998