Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

v3.7.0.1
Document And Entity Information - shares
6 Months Ended
Jun. 30, 2017
Aug. 04, 2017
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2017  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q2  
Entity Registrant Name Checkpoint Therapeutics, Inc.  
Entity Central Index Key 0001651407  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Common Class A [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   7,000,000
Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   18,368,575