| Document and Entity Information | Jun. 24, 2022 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0000007039 |
| Current Fiscal Year End Date | --12-31 |
| Document Type | 8-K |
| Document Period End Date | Jun. 24, 2022 |
| Entity Registrant Name | TRECORA RESOURCES |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-33926 |
| Entity Tax Identification Number | 75-1256622 |
| Entity Address, Address Line One | 1650 Hwy 6 South |
| Entity Address, Address Line Two | Suite 190 |
| Entity Address, City or Town | Sugar Land |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77478 |
| City Area Code | (281) |
| Local Phone Number | 980-5522 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.10 per share |
| Trading Symbol | TREC |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
