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Note 2 - Notes Payable and Long-term Debt (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Debt [Table Text Block]
   
Jun 30,
201
8
   
Dec 31,
201
7
 
Business Loan Agreement with BOKF – collateralized by real estate; payable as follows:
               
Line of Credit Note, as amended, in the maximum principal amount of $15,000,000, interest due monthly at LIBOR plus 1.85%; matures September 18, 2022
  $
8,354,668
    $
7,371,730
 
                 
Line of Credit Note, as amended, in the maximum principal amount of $6,000,000, interest due monthly at LIBOR plus 1.85%; matures September 18, 2019
   
-
     
-
 
    $
8,354,668
    $
7,371,730
 
Less current maturities
   
1,740,556
     
614,311
 
    $
6,614,112
    $
6,757,419