XML 21 R10.htm IDEA: XBRL DOCUMENT v3.21.1
Property and Equipment
 3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
Property and Equipment
(3) Property and Equipment: 
Property and equipment at March 31, 2021 and December 31, 2020 consisted of the following: 
 
(Thousands of dollars)
  
March 31,
2021
   
December 31,
2020
 
Proved oil and gas properties, at cost
  $521,035   $520,488 
Less: Accumulated depletion and depreciation
   (341,594)    (335,390) 
   
 
 
   
 
 
 
Oil and Gas Properties, Net
  $179,441    $185,098 
   
 
 
   
 
 
 
Field and office equipment
  $26,894   $26,797 
Less: Accumulated depreciation
   (20,979)    (20,842) 
   
 
 
   
 
 
 
Field and Office Equipment, Net
  $5,915   $5,955 
   
 
 
   
 
 
 
Total Property and Equipment, Net
  $185,356   $191,053