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v3.21.2

Note 2 - Cash, Cash Equivalents, and Investments (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Corporate Debt Securities [Member] |  |  |  |  |
Debt Securities, Held-to-maturity, Premium Paid on Purchase | $ 0 | $ 0 | $ 283,940 | $ 221,156 | $ 282,946

X
- Definition Represents premium paid on purchase for debt securities held-to-maturity. + References No definition available. + Details
Name: | dyai_DebtSecuritiesHeldToMaturityPremiumPaidOnPurchase
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |