Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable and Revenues from Contracts with Customers - Additional Information (Details)

v3.20.2
Accounts Receivable and Revenues from Contracts with Customers - Additional Information (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
Customer
Sep. 30, 2019
USD ($)
Customer
Dec. 31, 2019
USD ($)
Jan. 01, 2020
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Retained earnings $ 144,877   $ 319,987  
Accounts Receivable, Allowance for Credit Loss 154   52  
Accounts Receivable, Credit Loss Expense (Reversal) 26      
Accounts Receivable, Allowance for Credit Loss, Writeoff $ 0      
Name of Major Customer [Domain]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Commodity Products, Number of Customers | Customer 20      
Financing Receivable, Credit Risk Percentage 0.00%      
Accounts Receivable, Allowance for Credit Loss $ 0   0  
Accounts Receivable, Credit Loss Expense (Reversal) 0      
Accounts Receivable, Allowance for Credit Loss, Writeoff $ 0      
Joint Interest Partners, Mutual Operators [Domain]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Commodity Products, Number of Customers | Customer 3      
Financing Receivable, Credit Risk Percentage 5.00%     0.00%
Accounts Receivable, Allowance for Credit Loss $ 5   0  
Accounts Receivable, Credit Loss Expense (Reversal) 5      
Accounts Receivable, Allowance for Credit Loss, Writeoff $ 0      
Joint Interest Partners, Large Partners [Domain]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Commodity Products, Number of Customers | Customer 4      
Financing Receivable, Credit Risk Percentage 2.00%     1.00%
Accounts Receivable, Allowance for Credit Loss $ 67   0  
Accounts Receivable, Credit Loss Expense (Reversal) 7      
Accounts Receivable, Allowance for Credit Loss, Writeoff $ 0      
Joint Interest Partners, All Others [Domain]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Commodity Products, Number of Customers | Customer 30      
Financing Receivable, Credit Risk Percentage 10.00%     5.00%
Financing Receivable, Past Due $ 200      
Accounts Receivable, Allowance for Credit Loss 82   $ 52  
Accounts Receivable, Credit Loss Expense (Reversal) 14      
Accounts Receivable, Allowance for Credit Loss, Writeoff 0      
Cumulative Effect, Period of Adoption, Adjustment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Accounts Receivable, Allowance for Credit Loss       $ 76
Cumulative Effect, Period of Adoption, Adjustment [Member] | Name of Major Customer [Domain]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Accounts Receivable, Allowance for Credit Loss       0
Cumulative Effect, Period of Adoption, Adjustment [Member] | Joint Interest Partners, Mutual Operators [Domain]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Accounts Receivable, Allowance for Credit Loss       0
Cumulative Effect, Period of Adoption, Adjustment [Member] | Joint Interest Partners, Large Partners [Domain]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Accounts Receivable, Allowance for Credit Loss       60
Cumulative Effect, Period of Adoption, Adjustment [Member] | Joint Interest Partners, All Others [Domain]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Accounts Receivable, Allowance for Credit Loss       $ 16
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Retained earnings $ 100      
Accounts Receivable | Credit Concentration Risk        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Concentration risk, percentage 73.00%   55.00%  
Accounts receivable, major customers $ 17,900   $ 34,600  
Accounts Receivable | Customer Concentration Risk [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Number of major customers | Customer 3 4    
Revenues, major customers $ (113,400) $ (261,400)    
Concentration risk, percentage 56.00% 76.00%    
Accounts Receivable | Customer Concentration Risk [Member] | Major Customer 1        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Revenues, major customers $ (46,000)      
Concentration risk, percentage 23.00%      
Accounts Receivable | Customer Concentration Risk [Member] | Major Customer 2        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Revenues, major customers $ (40,400)      
Concentration risk, percentage 20.00%      
Accounts Receivable | Customer Concentration Risk [Member] | Major Customer 3        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Revenues, major customers $ (27,000)      
Concentration risk, percentage 13.00%