| Cover | Feb. 16, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 16, 2022 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 0-22923 |
| Entity Registrant Name | INTERNATIONAL ISOTOPES INC. |
| Entity Central Index Key | 0001038277 |
| Entity Tax Identification Number | 74-2763837 |
| Entity Incorporation, State or Country Code | TX |
| Entity Address, Address Line One | 4137 Commerce Circle |
| Entity Address, City or Town | Idaho Falls |
| Entity Address, State or Province | ID |
| Entity Address, Postal Zip Code | 83401 |
| City Area Code | 208 |
| Local Phone Number | 524-5300 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
