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Note 9 - Commitments and Contingencies (Tables) | 9 Months Ended
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Sep. 30, 2016
Notes Tables |
Schedule of Maturities of Contractual Obligations [Table Text Block] |
|  | Rental Commitments |
Payments due by period: |  |  |  |
One year |  | $ | 75,300 |
Two years |  |  | 31,600 |
Three years |  |  | — |
Thereafter |  |  | — |
Total |  | $ | 106,900 |

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- Definition Tabular disclosure of the aggregate amount of payments due on known contractual obligations for the five years following the date of the latest balance sheet date presented. + References No definition available. + Details
Name: | dffn_ScheduleOfMaturitiesOfContractualObligationsTableTextBlock
Namespace Prefix: | dffn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration