XML 72 R26.htm IDEA: XBRL DOCUMENT v3.19.2
Organization, Operations and Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Schedule of Concentration of Credit Risk

During the years ended December 31, 2018 and 2017, the joint interest operators that accounted for 10% or more of the Company’s total oil and natural gas revenue for at least one of the periods presented accounted for the following percentages of the Company’s total oil and natural gas revenue:

 

Operator  2018   2017 
         
A   14%   13%
B   -%   25%
C   47%   34%
D   18%   5%
Schedule of Property and Equipment Useful Life

Land, buildings, improvements, machinery and equipment are carried at cost. Depreciation of buildings, improvements, machinery and equipment is provided principally by the straight-line method over estimated useful lives as follows:

 

   Years 
Real estate:     
Buildings   20 to 45 
Building improvements   10 to 25 
Land improvements   10 to 35 
Administrative assets:     
Computers and software   3 to 10 
Office furniture and equipment   5 to 20 
Vehicles and other   5