XML 12 R1.htm IDEA: XBRL DOCUMENT v3.3.1.900
Document and Entity Information - shares
3 Months Ended
Feb. 29, 2016
Mar. 28, 2016
Document And Entity Information    
Entity Registrant Name NOVAGOLD RESOURCES INC  
Entity Central Index Key 0001173420  
Document Type 10-Q  
Document Period End Date Feb. 29, 2016  
Amendment Flag false  
Current Fiscal Year End Date --11-30  
Is Entity a Well-known Seasoned Issuer? No  
Is Entity a Voluntary Filer? No  
Is Entity's Reporting Status Current? Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   319,703,227
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2016