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

Represents contracted services for research and development expenses for related party.

No definition available.

Name:	dyai_ResearchAndDevelopmentExpenseContractedServicesRelatedParty
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents facilities, overhead and other for research and development expense.

No definition available.

Name:	dyai_ResearchAndDevelopmentExpenseFacilitiesOverheadAndOther
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents research and development expense including related party.

No definition available.

Name:	dyai_ResearchAndDevelopmentExpenseIncludingRelatedParty
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents outside contracted services for research and development expense.

No definition available.

Name:	dyai_ResearchAndDevelopmentExpenseOutsideContractedServices
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents personnel related costs for research and development expenses.

No definition available.

Name:	dyai_ResearchAndDevelopmentExpensePersonnelRelatedCosts
Namespace Prefix:	dyai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration