v2.4.0.6
Document And Entity Information
6 Months Ended
Jul. 01, 2012
Jul. 29, 2012
Document and Entity Information [Abstract]    
Entity Registrant Name ULTRALIFE CORP  
Document Type 10-Q  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   17,405,908
Amendment Flag false  
Entity Central Index Key 0000875657  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Filer Category Accelerated Filer  
Entity Well-known Seasoned Issuer No  
Document Period End Date Jul. 01, 2012  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q2