Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
May 15, 2017
Jun. 30, 2016
Document And Entity Information [Abstract]      
Document Type 10-K    
Document Period End Date false    
Document Fiscal Year Focus Dec. 31, 2016    
Document Fiscal Period Focus 2016    
Trading Symbol FY    
Entity Registrant Name FENX    
Entity Central Index Key Fenix Parts, Inc.    
Current Fiscal Year End Date 0001615153    
Entity Filer Category --12-31    
Entity Filer Category Non-accelerated Filer    
Entity Common Stock, Shares Outstanding (in shares)   20,327,685  
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 64