v2.4.0.8
Document and Entity Information
3 Months Ended
Mar. 29, 2015
Apr. 29, 2015
Document And Entity Information    
Entity Registrant Name Ultralife Corporation  
Entity Central Index Key 0000875657  
Document Type 10-Q  
Document Period End Date Mar. 29, 2015  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Is Entity a Well-known Seasoned Issuer? No  
Is Entity a Voluntary Filer? No  
Is Entity's Reporting Status Current? No  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   17,189,473
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2015