XML 50 R34.htm IDEA: XBRL DOCUMENT v3.21.1
Basis of Presentation - Additional Information (Details)
1 Months Ended 3 Months Ended 11 Months Ended 12 Months Ended
Mar. 22, 2019
USD ($)
a
Boe
well
location
Dec. 31, 2020
USD ($)
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Nov. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Nature Of Business And Presentation [Line Items]                
Maturity period of highly liquid investments             three months or less  
Impairment of oil and gas properties   $ 0   $ 199,900,000   $ 199,908,000   $ 48,412,000
Impairment of long-lived assets   0            
Liability for material uncertain tax positions   0         $ 0 0
Option vesting period             3 years  
Loss on sale of oil and gas properties   $ 0       $ 1,337,000   $ 33,508,000
Pirate                
Nature Of Business And Presentation [Line Items]                
Proceeds from divestiture of businesses $ 11,500,000              
Gas and oil area, undeveloped, net | a 3,400              
Productive oil wells, number of wells, net | well 6              
Proved undeveloped locations | location 7              
Production, barrels of oil equivalents | Boe 200              
Loss on sale of oil and gas properties         $ 33,500,000      
Unsecured Debt | Coronavirus Aid, Relief and Economic Security Act                
Nature Of Business And Presentation [Line Items]                
Debt instrument interest rate (as a percent)     1.00%          
Proceeds from issuance of debt     $ 2,200,000          
Corporate Headquarter                
Nature Of Business And Presentation [Line Items]                
Estimated useful lives             30 years  
Proved Oil And Gas Properties                
Nature Of Business And Presentation [Line Items]                
Impairment of oil and gas properties       199,000,000.0        
Unproved Oil and Gas Properties                
Nature Of Business And Presentation [Line Items]                
Impairment of oil and gas properties       $ 900,000        
Minimum | Other Property and Equipment                
Nature Of Business And Presentation [Line Items]                
Estimated useful lives             3 years  
Maximum | Other Property and Equipment                
Nature Of Business And Presentation [Line Items]                
Estimated useful lives             5 years  
Sales Revenue, Net | Customer Concentration Risk | Shell Trading (US) Company                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage           10.00%   23.00%
Sales Revenue, Net | Customer Concentration Risk | Texla Energy Management, Inc.                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage   24.00%       22.00%   17.00%
Sales Revenue, Net | Customer Concentration Risk | Enterprise Crude Oil LLC                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage   24.00%       23.00%   16.00%
Sales Revenue, Net | Customer Concentration Risk | Ace Gathering, Inc.                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage   31.00%       21.00%   14.00%
Sales Revenue, Net | Customer Concentration Risk | GulfMark Energy, Inc.                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage               13.00%
Sales Revenue, Net | Customer Concentration Risk | NGL Crude Logistics LLC                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage           14.00%   10.00%
Accounts Receivable | Customer Concentration Risk | Shell Trading (US) Company                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage   10.00%           11.00%
Accounts Receivable | Customer Concentration Risk | Texla Energy Management, Inc.                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage   19.00%           59.00%
Accounts Receivable | Customer Concentration Risk | Enterprise Crude Oil LLC                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage   24.00%            
Accounts Receivable | Customer Concentration Risk | Ace Gathering, Inc.                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage   23.00%           13.00%
Accounts Receivable | Customer Concentration Risk | NGL Crude Logistics LLC                
Nature Of Business And Presentation [Line Items]                
Concentration risk, percentage   14.00%