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Note 11 - Costs to Obtain and Fulfill a Contract (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Capitalized Contract Cost [Table Text Block]
  June 30, 2021 
     

Balance, beginning of period

 $111,066 

Deferral of costs

  92,308 

Recognized costs

  (88,736)

Balance, end of period

 $114,638