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Note 11 - Commitments and Contingencies - Contractual Obligations (Details) | Dec. 31, 2015 USD ($)
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Payments due by period: |
One year | $ 72,920
Two years | 74,355
Three years | 12,432
Total | $ 159,707

X
- Definition Amount of contractual obligation maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | dffn_ContractualObligationDueInNextRollingTwelveMonths
Namespace Prefix: | dffn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation maturing in the third rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | dffn_ContractualObligationDueInNextRollingYearThree
Namespace Prefix: | dffn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation maturing in the second rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | dffn_ContractualObligationDueInNextRollingYearTwo
Namespace Prefix: | dffn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | dffn_ContractualObligationRollingMaturityAbstract
Namespace Prefix: | dffn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant