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VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
VALUATION AND QUALIFYING ACCOUNTS
TRECORA RESOURCES AND SUBSIDIARIES
VALUATION AND QUALIFYING ACCOUNTS
Three years ended December 31, 2020
DescriptionBeginning
balance		Charged
(credited)
to earnings		DeductionsEnding
balance
ALLOWANCE FOR DEFERRED
TAX ASSET
December 31, 2018225,622 — — 225,622 
December 31, 2019225,622 — — 225,622 
December 31, 2020225,622 — — 225,622 
DescriptionBeginning
balance		Charged
to earnings		DeductionsEnding
balance
ALLOWANCE FOR DOUBTFUL
ACCOUNTS
December 31, 2018300,000 152,000 — 452,000 
December 31, 2019452,000 (23,000)— 429,000 
December 31, 2020429,000 — (129,000)300,000