Note 7 - Subsequent Events (Details Textual) - Sorrento Therapeutics, Inc. [Member] - Subsequent Event [Member]	Aug. 10, 2021 USD ($)
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

The maximum milestone payments to be received under the license agreement.

No definition available.

Name:	dyai_LicenseAgreementMaximumMilestonePaymentsReceivable
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The maximum amount of reimbursements for preclinical and clinical development costs under the license agreement.

No definition available.

Name:	dyai_LicenseAgreementMaximumReimbursementsForPreclinicalAndClinicalDevelopmentCosts
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of up-front fee receivable under the license agreement.

No definition available.

Name:	dyai_LicenseAgreementUpfrontFeeReceivable
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of up-front fee receivable under the license agreement to be received in cash.

No definition available.

Name:	dyai_LicenseAgreementUpfrontFeeReceivableCash
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of up front fee receivable under the license agreement to be received in shares.

No definition available.

Name:	dyai_LicenseAgreementUpfrontFeeReceivableShares
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	srt_CounterpartyNameAxis=dyai_SorrentoTherapeuticsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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