Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

v3.20.2
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 18, 2020
Sep. 30, 2020
USD ($)
revenue_source
geographic_area
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
revenue_source
geographic_area
Sep. 30, 2019
USD ($)
Accounting Policies [Line Items]          
Reverse stock split ratio 0.1        
Number of revenue sources | revenue_source   2   2  
Number of geographic areas in which entity operates | geographic_area   1   1  
Oil          
Accounting Policies [Line Items]          
Sales   $ 70,600 $ 152,800 $ 215,700 $ 416,300
Natural Gas and NGL          
Accounting Policies [Line Items]          
Sales   3,100 5,200 8,800 24,300
Oil and Gas Sales          
Accounting Policies [Line Items]          
Sales   $ 73,680 $ 157,989 $ 224,541 $ 440,519
Oil and Gas Sales | Sales | Operator Concentration Risk | Top Four Operators          
Accounting Policies [Line Items]          
Concentration risk percentage   48.00% 45.00% 49.00% 52.00%