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Note 1 - Organization and Summary of Significant Accounting Policies - Research and Development Costs (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Outside contracted services	$ 1,659,194	$ 613,790
Personnel related costs	148,162	123,638
Facilities, overhead and other	742	18,025
Research And Development Expense, Including Related Party	$ 1,808,098	$ 755,453

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