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Note 15 - Concentrations (Details Textual)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Revenue from Contract with Customer, Including Assessed Tax $ 1,271,028 $ 40,942 $ 2,395,270 $ 89,636  
Cash and Cash Equivalents, at Carrying Value, Ending Balance 812,477   812,477   $ 641,536
Cash, Uninsured Amount $ 527,373   $ 527,373   $ 489,235
Customer Concentration Risk [Member] | Advertising Revenue [Member]          
Number of Major Customers 2        
Customer Concentration Risk [Member] | Advertising Revenue [Member] | Customer One [Member]          
Revenue from Contract with Customer, Including Assessed Tax $ 680,192        
Customer Concentration Risk [Member] | Advertising Revenue [Member] | Customer Two [Member]          
Revenue from Contract with Customer, Including Assessed Tax 184,376        
Customer Concentration Risk [Member] | Accounts Receivable [Member]          
Number of Major Customers     1   3
Accounts Receivable, after Allowance for Credit Loss, Total $ 1,296,246   $ 1,296,246   $ 8,814