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Note 7 - Notes Payable (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
March 31, 2020
   
December 31, 2019
 
RBL Capital Group, LLC
  $
9,431,157
    $
9,431,157
 
Less: deferred loan costs
   
(169,444
)    
(179,610
)
Subtotal
   
9,261,713
     
9,251,547
 
Less: current portion    
(909,086
)    
(909,086
)
Long term debt   $
8,352,627
    $
8,342,461
 
Schedule of Maturities of Long-term Debt [Table Text Block]
2020 (remainder of year)
  $
909,086
 
2021    
2,022,338
 
2022    
2,328,727
 
2023    
3,413,139
 
2024    
757,866
 
Balance March 31, 2020
  $
9,431,157