Document and Entity Information - USD ($)
12 Months Ended
Jan. 02, 2018
May 04, 2018
Jul. 04, 2017
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jan. 02, 2018    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Trading Symbol JMBA    
Entity Common Stock, Shares Outstanding   15,588,206  
Entity Registrant Name JAMBA, INC.    
Entity Central Index Key 0001316898    
Current Fiscal Year End Date --01-02    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 54,659,392