Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Additional Information (Details)

v3.20.1
STOCK-BASED COMPENSATION - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2012
Jul. 31, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense $ 390 $ 213    
Stock Option Plan for Key Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized (in shares)       1,000,000
Stock Option Plan for Key Employees | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation, term of award 10 years      
Options, weighted average grant-date fair value (in dollars per share) $ 0 $ 0    
Stock Option Plan for Key Employees | Stock Options | Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding, in-the-money (in shares) 100,000      
Stock Option Plan for Key Employees | Stock Options | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 4 years      
Stock Option Plan for Key Employees | Stock Options | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 5 years      
Stock Option Plan for Key Employees | Stock Options and Warrants        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted (in shares) 0 0    
Awards granted during period (in shares) 0 0    
Trecora Resources Stock and Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized (in shares)     2,500,000  
Trecora Resources Stock and Incentive Plan | Restricted Stock Unit Awards | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 2 years 6 months      
Trecora Resources Stock and Incentive Plan | Restricted Stock Unit Awards | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 5 years