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Note 4 - Property and Equipment
 12 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
4.
Property and equipment:
 
Property and equipment consist of the following:
 
   
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
  
 
Depreciation of property and equipment:
 
   
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
  
 
During the year ended
December 31,
201
7,
property, plant and equipment with a net book value of
$16,951
was written off. During the years ended
December 31, 2016
and
2015,
no
property, plant and equipment were written off.