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Note 12 - Costs to Obtain and Fulfill a Contract (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Capitalized Contract Cost [Table Text Block]
    June 30, 2020  
         
Balance, beginning of period   $ 109,167  
Deferral of costs     88,194  
Recognized costs     (83,137 )
Balance, end of period   $ 114,224