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Note 12 - Stockholders' Equity (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Stockholders Equity [Table Text Block]
   
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
Accumulated
    
 
 
 
   
 
 
 
  
 
 
 
  
Additional
    
Retained
    
other
    
Total
  
   
 
 
 
  
Common stock
    
paid in
    
earnings
    
comprehensive
    
stockholders'
  
   
Number
    
Amount
    
capital
    
(deficit)
    
income (loss)
    
equity
  
                                                 
Balances, June 30, 2017
    
10,552,401
     $
15,125,326
     $
1,607,476
     $
28,062,438
     $
330,106
     $
45,125,346
  
Exercise of stock options
    
30,051
      
159,307
      
(91,241
 )    
-
      
-
      
68,066
  
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration
    
(4,903
 )    
 
      
(116,956
 )    
-
      
-
      
(116,956
 )
Stock-based compensation (note 13)
    
-
      
-
      
202,902
      
-
      
-
      
202,902
  
Net income
    
-
      
-
      
-
      
3,439,266
      
-
      
3,439,266
  
Accretion of redeemable non-controlling interest in Ting
Virginia, LLC.
    
-
      
-
      
-
      
(12,600
 )    
-
      
(12,600
 )
Other comprehensive income (loss)
    
-
      
-
      
-
      
-
      
(8,071
 )    
(8,071
 )
Balances, September 30, 2017
    
10,577,549
     $
15,284,633
     $
1,602,181
     $
31,489,104
     $
322,035
     $
48,697,953
  
   
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
Accumulated
    
 
 
 
   
 
 
 
  
 
 
 
  
Additional
    
Retained
    
other
    
Total
  
   
 
 
 
  
Common stock
    
paid in
    
earnings
    
comprehensive
    
stockholders'
  
   
Number
    
Amount
    
capital
    
(deficit)
    
income (loss)
    
equity
  
                                                 
Balances, December 31, 2016
    
10,461,574
     $
14,460,500
     $
2,857,921
     $
20,399,511
     $
99,154
     $
37,817,086
  
Exercise of stock options
    
165,673
      
824,133
      
(651,230
 )    
-
      
-
      
172,903
  
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration
    
(49,698
 )    
-
      
(1,438,497
 )    
-
      
-
      
(1,438,497
 )
Stock-based compensation (note 13)
    
-
      
-
      
833,987
      
-
      
-
      
833,987
  
Net income
    
-
      
-
      
-
      
11,127,241
      
-
      
11,127,241
  
Accretion of redeemable non-controlling interest in Ting
Virginia, LLC.
    
-
      
-
      
-
      
(37,648
 )    
-
      
(37,648
 )
Other comprehensive income (loss)
    
-
      
-
      
-
      
-
      
222,881
      
222,881
  
Balances, September 30, 2017
    
10,577,549
     $
15,284,633
     $
1,602,181
     $
31,489,104
     $
322,035
     $
48,697,953