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Cover
Aug. 17, 2021
Affiliate, Collateralized Security [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 17, 2021
Entity File Number 000-51353
Entity Registrant Name Protagenic Therapeutics, Inc.\new
Entity Central Index Key 0001022899
Entity Tax Identification Number 06-1390025
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 149 Fifth Avenue
Entity Address, Address Line Two Suite 500
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10010
City Area Code 212
Local Phone Number 994-8200
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Protagenic Therapeutics, Inc. Common Stock  
Affiliate, Collateralized Security [Line Items]  
Title of 12(b) Security Protagenic Therapeutics, Inc. Common Stock
Trading Symbol PTIX
Security Exchange Name NASDAQ
Protagenic Therapeutics, Inc. Common Stock Warrants  
Affiliate, Collateralized Security [Line Items]  
Title of 12(b) Security Protagenic Therapeutics, Inc. Common Stock Warrants
Trading Symbol PTIXW
Security Exchange Name NASDAQ