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Note 5 - Commitments and Contingencies (Details Textual) |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Aug. 13, 2020 USD ($) ft² | Jun. 30, 2020 USD ($) ft² | Mar. 23, 2020 EUR (€) | Oct. 25, 2019 EUR (€) | Jun. 28, 2019 EUR (€) | Dec. 31, 2020 USD ($)
VTT Technical Research Centre of Finland Ltd [Member] |  |  |  |  |  |
Commitment Development Period (Year) |  |  |  |  | 3 years |
Commitment Success Bonus Award |  |  |  |  | € 450,000 |
Commitment To Pay, Expanded |  |  |  | € 690,000 |  |
Commitment To Pay, Expanded, Period (Year) |  |  |  | 1 year 6 months |  |
Commitment To Pay, Additional |  |  | € 700,000 |  |  |
Commitments, Right To Terminate Contract Notice Period (Day) |  |  | 90 days |  |  |
Jupiter Florida Headqauarters Lease [Member] |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 2,000 | 4,900 |  |  |  |
Operating Leases, Monthly Rental Rate | $ | $ 4,200 | $ 9,700 |  |  |  |
Netherlands Office Lease [Member] |  |  |  |  |  |
Operating Leases, Annual Rental Rate | $ |  |  |  |  |  | $ 4,000
Commitment To Pay |  |  |  |  | € 2,520,000 |

X
- Definition Represents commitment development period + References No definition available. + Details
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Namespace Prefix: | dyai_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents commitment success bonus award. + References No definition available. + Details
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Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents commitment to pay. + References No definition available. + Details
Name: | dyai_CommitmentToPay
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents additional commitment to pay. + References No definition available. + Details
Name: | dyai_CommitmentToPayAdditional
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents expanded commitment to pay. + References No definition available. + Details
Name: | dyai_CommitmentToPayExpanded
Namespace Prefix: | dyai_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Represents expanded period for commitment to pay. + References No definition available. + Details
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Namespace Prefix: | dyai_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents right to terminate contract notice period for commitments. + References No definition available. + Details
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Balance Type: | debit
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Namespace Prefix: | dyai_
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Balance Type: | debit
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
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X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=dyai_JupiterFloridaHeadqauartersLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=dyai_NetherlandsOfficeLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |