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Note 4 - Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
December 31,
201
7
    
December 31,
201
6
  
Computer equipment
   $
12,312,120
     $
8,122,420
  
Computer software
    
1,449,480
      
1,277,972
  
Furniture and equipment
    
1,308,171
      
1,168,691
  
Vehicles and tools
    
1,305,900
      
830,543
  
Fiber network
    
14,052,618
      
7,095,971
  
Customer equipment and installations
    
6,774,031
      
3,889,581
  
Leasehold improvements
    
170,619
      
110,453
  
     
37,372,939
      
22,495,631
  
Less:
                
Accumulated depreciation
    
12,752,641
      
9,045,193
  
    $
24,620,298
     $
13,450,438
  
Schedule of Depreciation [Table Text Block]
   
Year ended
December 31,
201
7
    
Year ended
December 31,
201
6
    
Year ended
December 31,
201
5
  
Depreciation of property and equipment
   $
3,727,822
     $
1,823,683
     $
1,404,296