| Document And Entity Information | Dec. 16, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | Dyadic International, Inc. |
| Document, Type | 8-K |
| Document, Period End Date | Dec. 16, 2021 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 000-55264 |
| Entity, Tax Identification Number | 45-0486747 |
| Entity, Address, Address Line One | 140 Intracoastal Pointe Drive, Suite 404 |
| Entity, Address, City or Town | Jupiter |
| Entity, Address, State or Province | FL |
| Entity, Address, Postal Zip Code | 33477 |
| City Area Code | 561 |
| Local Phone Number | 743-8333 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | DYAI |
| Security Exchange Name | NASDAQ |
| Amendment Flag | false |
| Entity, Central Index Key | 0001213809 |
