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Note 7 - Subsequent Events (Details Textual) - Sorrento Therapeutics, Inc. [Member] - Subsequent Event [Member] | Aug. 10, 2021 USD ($)
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License Agreement, Up-front Fee Receivable | $ 10,000,000
License Agreement, Up-front Fee Receivable, Cash | 5,000,000
License Agreement, Up-front Fee Receivable, Shares | 5,000,000
License Agreement, Maximum Reimbursements for Preclinical and Clinical Development Costs | 4,000,000
License Agreement, Maximum Milestone Payments Receivable | $ 33,000,000

X
- Definition The maximum milestone payments to be received under the license agreement. + References No definition available. + Details
Name: | dyai_LicenseAgreementMaximumMilestonePaymentsReceivable
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The maximum amount of reimbursements for preclinical and clinical development costs under the license agreement. + References No definition available. + Details
Name: | dyai_LicenseAgreementMaximumReimbursementsForPreclinicalAndClinicalDevelopmentCosts
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of up-front fee receivable under the license agreement. + References No definition available. + Details
Name: | dyai_LicenseAgreementUpfrontFeeReceivable
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of up-front fee receivable under the license agreement to be received in cash. + References No definition available. + Details
Name: | dyai_LicenseAgreementUpfrontFeeReceivableCash
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of up front fee receivable under the license agreement to be received in shares. + References No definition available. + Details
Name: | dyai_LicenseAgreementUpfrontFeeReceivableShares
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_CounterpartyNameAxis=dyai_SorrentoTherapeuticsIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |