v3.19.2
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 02, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name NN INC  
Entity Central Index Key 0000918541  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus (i.e. Q1,Q2,Q3,FY) Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   42,366,961
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Current Reporting Status Yes