Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

v3.8.0.1
Document And Entity Information - shares
3 Months Ended
Mar. 31, 2018
May 09, 2018
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1  
Entity Registrant Name Checkpoint Therapeutics, Inc.  
Entity Central Index Key 0001651407  
Current Fiscal Year End Date --12-31  
Entity Filer Category 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   25,015,088