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Note 3 - Company Operations (Tables)
9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   
201
7
   
20
16
 
Revenues
:
               
Oil and Gas
  $
465,710
    $
359,951
 
Timber
   
8,966
     
125,860
 
Surface
   
318,423
     
152,188
 
Total
   
793,099
     
637,999
 
Cost and Expenses
:
               
Oil and Gas
   
46,717
     
43,009
 
Timber
   
8,883
     
23,018
 
Surface
   
37,277
     
55,501
 
Total
   
92,877
     
121,528
 
Income from Operations
:
               
Oil and Gas
   
418,993
     
316,942
 
Timber
   
83
     
102,842
 
Surface
   
281,146
     
96,687
 
Total
   
700,222
     
516,471
 
Other
Expense before Income Taxes:
  $
(303,676
)   $
(354,737
)
Income before Income Taxes
   
396,546
     
161,734
 
                 
Identifiable Assets
, net of accumulated depreciation:
               
Oil and Gas
   
--
     
--
 
Timber
   
2,111,302
     
2,064,058
 
Surface
   
--
     
--
 
General Corporate Assets
   
12,537,150
     
12,314,402
 
Total
   
14,648,452
     
14,378,460
 
                 
Capital Expenditures
:
               
Oil and Gas
   
--
     
--
 
Timber
   
38,934
     
519,721
 
Surface
   
--
     
--
 
General Corporate Assets
:
   
88,788
     
1,881,319
 
Total
   
127,722
     
2,401,040
 
                 
Depreciation
and Depletion:
               
Oil and Gas
   
--
     
--
 
Timber
   
--
     
1,751
 
Surface
   
--
     
--
 
General Corporate Assets
   
701
     
236
 
Total
  $
701
    $
1,987
 
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
Count
 
201
7
   
201
6
 
1
  $
179,292
    $
112,835
 
2
   
100,322
     
97,135
 
3
   
88,284
     
63,449
 
4
   
56,008
     
52,063
 
5
   
45,443
     
51,020
 
6
   
40,655
     
47,666