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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

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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: