Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 04, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Registrant Name Kadmon Holdings, Inc.  
Entity Central Index Key 0001557142  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Common Stock, Shares Outstanding   129,690,886
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Shell Company false  
Entity Small Business true