Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.20.1
Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Mar. 02, 2020
Jun. 30, 2019
Document and Entity Information [Abstract]      
Entity Registrant Name TRECORA RESOURCES    
Entity Central Index Key 0000007039    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 175
Entity Common Stock, Shares Outstanding   24,750,835  
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false    
Entity Emerging Growth Company false    
Entity Small Business true    
Entity Shell Company false    
Document Period End Date Dec. 31, 2019