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v3.20.1

Note 11 - Subsequent Event (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 17, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Proceeds from Warrant Exercises |  | $ 3,888,425 |
Subsequent Event [Member] |  |  |
Class of Warrant or Right, Exercised | 1,124,071 |  |
Class of Warrant or Right, Exercised During Period, Exercise Price | $ 0.35 |  |
Proceeds from Warrant Exercises | $ 400,000 |  |

X
- Definition Number of warrants or rights exercised. + References No definition available. + Details
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Balance Type: | na
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X
- Definition Exercise price per share of warrants or rights exercised during period. + References No definition available. + Details
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Namespace Prefix: | dffn_
Data Type: | num:perShareItemType
Balance Type: | na
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X
- Definition The cash inflow associated with the amount received from holders exercising their stock warrants. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Details
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