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Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2019
Aug. 08, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2019  
Entity Registrant Name PRECISION BIOSCIENCES INC  
Entity Central Index Key 0001357874  
Trading Symbol DTIL  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Common Stock, Shares Outstanding   50,630,932
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Ex Transition Period false  
Entity File Number 001-38841  
Entity Tax Identification Number 204206017  
Entity Address, Address Line One 302 East Pettigrew St.  
Entity Address, Address Line Two Suite A-100  
Entity Address, City or Town Durham  
Entity Address, State or Province North Carolina  
Entity Address, Postal Zip Code 27701  
City Area Code 919  
Local Phone Number 314-5512