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Note 4 - Provision for Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Year Ended December 31,
  
   
2016
    
2015
  
   
Amount
   
%
   
Amount
   
%
 
Provision based on the
statutory rate
   $
(2,034,000
 )    
(34.0
 )   $
(7,357,000
 )    
(34.0
 )
                                 
Tax effect of:
                                
Non-taxable status of the
Programs and Everflow
    
1,881,000
     
31.4
     
7,130,000
     
32.9
 
Excess statutory depletion
    
-
     
0.0
     
(30,000
 )    
(0.1
 )
Graduated tax rates, permanent
differences between book and
tax items, tax credits and
other - net
    
133,400
     
2.2
     
147,600
     
0.7
 
                                 
Total
   $
(19,600
 )    
(0.4
 )   $
(109,400
 )    
(0.5
 )