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Note 1 - Organization and Summary of Significant Accounting Policies - Research and Development Costs (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Outside contracted services | $ 3,302,034 | $ 2,578,507
Contracted services - related party | 0 | 868,720
Personnel related costs | 531,405 | 423,898
Facilities, overhead and other | 34,682 | 85,192
Research And Development Expense, Including Related Party | $ 3,868,121 | $ 3,956,317

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

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