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Note 2 - Summary of Credit Agreement and Line of Credit Note (Details) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Promissory Note with BOKF [Member]    
Line of Credit Note dated September 18, 2015, in the maximum principal amount of $10,000,000 with features as more fully described above – interest due monthly at LIBOR plus 1.85%; matures September 18, 2020 $ 6,581,224 $ 3,711,225
Promissory Note and Business Loan Agreement with BOKF [Member]    
Line of Credit Note dated September 18, 2015, in the maximum principal amount of $10,000,000 with features as more fully described above – interest due monthly at LIBOR plus 1.85%; matures September 18, 2020 0
6,581,224 $ 3,711,225
Current maturities of long-term debt 822,653 231,952
LONG-TERM DEBT, net of current maturities $ 5,758,571 $ 3,479,273