Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

v3.21.1
SUBSEQUENT EVENTS (Details)
 1 Months Ended 3 Months Ended
Apr. 30, 2021
MMBTU
$ / MMBTU
Mar. 31, 2021
MMBTU
$ / bbl
Basis Swap, Rex Zone 3 - 2022    
Subsequent Event [Line Items]    
Daily volume (in MMBtu) | MMBTU   14,795
Weighted average price (in usd per MMBtu or Bbl) | $ / bbl   (0.10)
Basis Swap, Rex Zone 3 - 2022 | Subsequent Event    
Subsequent Event [Line Items]    
Daily volume (in MMBtu) | MMBTU 40,000  
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU (0.10)  
NYMEX Henry Hub 2022 Index1 | Subsequent Event    
Subsequent Event [Line Items]    
Daily volume (in MMBtu) | MMBTU 139,773  
NYMEX Henry Hub 2022 Index1 | Subsequent Event | Minimum    
Subsequent Event [Line Items]    
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU 2.40  
NYMEX Henry Hub 2022 Index1 | Subsequent Event | Maximum    
Subsequent Event [Line Items]    
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU 2.60  
NYMEX Henry Hub 2022 Index2    
Subsequent Event [Line Items]    
Daily volume (in MMBtu) | MMBTU   186,438
NYMEX Henry Hub 2022 Index2 | Subsequent Event    
Subsequent Event [Line Items]    
Daily volume (in MMBtu) | MMBTU 1,500  
NYMEX Henry Hub 2022 Index2 | Subsequent Event | Minimum    
Subsequent Event [Line Items]    
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU 55.00  
NYMEX Henry Hub 2022 Index2 | Subsequent Event | Maximum    
Subsequent Event [Line Items]    
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU 60.00