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Debt - Par Pacific Term Loan Agreement (Details) - USD ($)
12 Months Ended
Jan. 09, 2019
Dec. 31, 2020
Dec. 31, 2019
London Interbank Offered Rate (LIBOR)      
Debt Instrument [Line Items]      
Basis spread on variable rate   3.25%  
Term Loan | Par Pacific Term Loan      
Debt Instrument [Line Items]      
Debt instrument, face amount $ 45,000,000.0    
Gain (Loss) on debt extinguishment and commitment costs     $ 100,000
Term Loan | Par Pacific Term Loan | London Interbank Offered Rate (LIBOR)      
Debt Instrument [Line Items]      
Basis spread on variable rate 3.50%