XML 13 R1.htm IDEA: XBRL DOCUMENT v3.5.0.2
Document And Entity Information - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2016
Jul. 27, 2016
Dec. 31, 2014
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)   10,433,396  
Entity Public Float     $ 0.8
Document Type S-1    
Document Period End Date Jun. 30, 2016    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus Q2    
Amendment Flag false