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Note 6 - Warrants Outstanding (Details) (Parentheticals) - shares | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Warrants Outstanding (in shares) | 3,403,367 | 3,153,367
Warrant Issued for Financing and Stock Subscriptions [Member] |  |
Warrants Outstanding (in shares) | 2,100,000 | 2,100,000
Warrant Issued for Financing and Stock Subscriptions [Member] | Major Stockholder and Chairman [Member] |  |
Warrants Outstanding (in shares) | 300,000 | 300,000

X
- Definition The total number of warrants of an entity issued. + References No definition available. + Details
Name: | atrn_ClassOfWarrantsOrRightsIssued
Namespace Prefix: | atrn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=atrn_WarrantIssuedForFinancingAndStockSubscriptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=atrn_MajorStockholderAndChairmanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |