XML 12 R1.htm IDEA: XBRL DOCUMENT v3.6.0.2
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2016
Nov. 17, 2016
Document Information [Line Items]    
Entity Registrant Name Protagenic Therapeutics, Inc.\new  
Entity Central Index Key 0001022899  
Trading Symbol atrn  
Current Fiscal Year End Date --12-31  
Entity Filer Category Smaller Reporting Company  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer No  
Entity Common Stock, Shares Outstanding (in shares)   8,307,915
Document Type S-1/A  
Document Period End Date Sep. 30, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3  
Amendment Flag true  
Amendment Description 1