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Note 6 - Company Operations (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   
2017
   
2016
 
Revenues
     
 
 
Oil and Gas
  $
609,122
    $
510,856
 
Timber
   
224,111
     
125,860
 
Surface
   
273,019
     
189,019
 
Surface
– related party
   
38,333
     
37,667
 
Total
   
1,144,585
     
863,402
 
Cost and Expenses
     
 
 
Oil and Gas
   
62,315
     
57,115
 
Timber
   
35,692
     
27,957
 
Surface
   
43,929
     
82,081
 
Total 
   
141,936
     
167,153
 
Income from Operations
     
 
 
Oil and Gas
   
546,807
     
453,741
 
Timber
   
188,419
     
97,903
 
Surface
   
267,423
     
144,605
 
Total
   
1,002,649
     
696,249
 
Other Income (Expense) before Income Taxes
   
(416,562
)    
(473,938
)
Income before Income Taxes
   
586,087
     
222,311
 
                 
Identifiable Assets
, net of accumulated depreciation and depletion
               
Oil and Gas
   
--
     
--
 
Timber
   
2,119,180
     
2,072,368
 
Surface
   
--
     
--
 
General Corporate Assets
   
12,604,557
     
12,345,956
 
Total
   
14,723,737
     
14,418,324
 
                 
Capital Expenditures
               
Oil and Gas
   
--
     
--
 
Timber
   
62,473
     
528,031
 
Surface
   
--
     
--
 
General Corporate Assets
   
92,157
     
1,879,519
 
     
154,630
     
2,407,550
 
   
2017
   
2016
 
Depreciation and
Depletion
               
Oil and Gas
   
--
     
--
 
Timber
   
15,661
     
1,751
 
Surface
   
--
     
--
 
General Corporate Assets
   
1,191
     
467
 
Total
  $
16,852
    $
2,218
 
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
Count
   
201
7
   
201
6
 
1     $
179,292
    $
129,529
 
2      
163,483
     
117,827
 
3      
131,837
     
67,303
 
4      
113,280
     
66,178
 
5      
70,760
     
63,449
 
6      
61,677
     
63,309
 
7      
51,814
     
54,697