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Note 3 - Allocation of Consideration Transferred (Details) (Parentheticals) - Protagenic Therapeutics Inc [Member] | Feb. 12, 2016 shares
--- | ---
Common Stock [Member] |
Stock Issued During Period, Shares, Reverse Stock Split, Post-split | 25,867
Preferred Stock [Member] | Series B Preferred Stock [Member] |
Stock Issued During Period, Shares, Conversion of Series A Preferred Stock to Series B Preferred Stock | 297,468
Stock Issued During Period, Shares, Conversion of Series A Preferred Stock to Series B Preferred Stock | 297,468

X
- Definition Number of shares issued during the period as a result of the conversion of Series A Preferred Stock to Series B Preferred Stock. + References No definition available. + Details
Name: | atrn_StockIssuedDuringPeriodSharesConversionOfSeriesAPreferredStockToSeriesBPreferredStock
Namespace Prefix: | atrn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares remaining as a result of a reverse stock split. + References No definition available. + Details
Name: | atrn_StockIssuedDuringPeriodSharesReverseStockSplitPostsplit
Namespace Prefix: | atrn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=atrn_ProtagenicTherapeuticsIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |