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Note 1 - Organization and Summary of Significant Accounting Policies - Research and Development Costs (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Outside contracted services | $ 1,659,194 | $ 613,790
Personnel related costs | 148,162 | 123,638
Facilities, overhead and other | 742 | 18,025
Research And Development Expense, Including Related Party | $ 1,808,098 | $ 755,453

X
- Definition Represents facilities, overhead and other for research and development expense. + References No definition available. + Details
Name: | dyai_ResearchAndDevelopmentExpenseFacilitiesOverheadAndOther
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents research and development expense including related party. + References No definition available. + Details
Name: | dyai_ResearchAndDevelopmentExpenseIncludingRelatedParty
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents outside contracted services for research and development expense. + References No definition available. + Details
Name: | dyai_ResearchAndDevelopmentExpenseOutsideContractedServices
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents personnel related costs for research and development expenses. + References No definition available. + Details
Name: | dyai_ResearchAndDevelopmentExpensePersonnelRelatedCosts
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration