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Note 2 - Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2018
Notes Tables  
Consolidation, Wholly Owned and Less than Wholly Owned Subsidiary, Parent Ownership Interest [Table Text Block]
Company
Registered
 
% Owned
 
Shoal Media (Canada) Inc.
British Columbia, Canada
   
100%
 
Coral Reef Marketing Inc.
Anguilla
   
100%
 
Rooplay Media Ltd.
British Columbia, Canada
   
100%
 
Rooplay Media Kenya Limited
Kenya
   
100%
 
Shoal Media Inc.
Anguilla
   
100%
 
Shoal Games (UK) Plc
United Kingdom
   
99%
 
Shoal Media (UK) Ltd.
United Kingdom
   
100%
 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   
2018
   
2017
 
Expected dividend yield
   
-
     
-
 
Expected stock price volatility
   
25
%    
-
 
Weighted average volatility
   
25
%    
-
 
Risk-free interest rate
   
1.56
%    
-
 
Expected life of options (in years)
 
5
     
-
 
Forfeiture rate
   
5
%    
-
 
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   
March 31, 2018
   
December 31, 2017
 
Average stock price
   
 CAD $0.67
     
CAD$ 0.65
 
Expected dividend yield
   
-
     
-
 
Expected stock price volatility
   
97.57
%    
93.74
%
Risk-free interest rate
   
1.09
%    
1.66
%
Expected life of warrants
 
76 days
   
0.5 year