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Note 15 - Fair Value Measurements (Details Textual) | Jan. 08, 2016
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Diffusion LLC [Member] |
Business Combination, Period Following Merger in Which Receipt of Cash for Discontinued Product Assets Would Trigger Contingent Value Right Payements | 5 years

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- Definition The period following a merger that, if the reporting entity receives net cash payments for the sale of any of the assets related to a discontinued product line, would trigger a required payment to holders of contingent value rights. + References No definition available. + Details
Name: | dffn_BusinessCombinationPeriodFollowingMergerInWhichReceiptOfCashForDiscontinuedProductAssetsWouldTriggerContingentValueRightPayements
Namespace Prefix: | dffn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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