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Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Receivables [Abstract]      
Oil, natural gas and NGL sales $ 12,757 $ 22,281  
Joint interest billing 6,421 5,165  
Other 4,754 2,315  
Total accounts receivable 23,932 29,761  
Less: allowance for doubtful accounts (4,356) (1,117) $ (1,295)
Total accounts receivable, net $ 19,576 $ 28,644