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Note 13 - Stockholders' Equity (Tables)
 6 Months Ended
Jun. 30, 2018
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, March 31, 2018
    
10,592,115
     $
15,426
     $
2,547
     $
47,419
     $
17
     $
65,409
  
Exercise of stock options
    
16,153
      
122
      
(90
 )    
-
      
-
      
32
  
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration
    
(4,902
 )    
 
      
(141
 )    
-
      
-
      
(141
 )
Stock-based compensation (note 14)
    
-
      
-
      
615
      
-
      
-
      
615
  
                                                 
                                                 
Net income
    
-
      
-
      
-
      
3,608
      
-
      
3,608
  
Accretion of redeemable non-controlling interest in Ting Virginia, LLC.
    
-
      
-
      
-
      
-
      
-
      
-
  
Other comprehensive loss
    
-
      
-
      
-
      
-
      
(260
 )    
(260
 )
                                                 
Balances, June 30, 2018
    
10,603,366
     $
15,548
     $
2,931
     $
51,027
     $
(243
 )   $
69,263
   
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
Accumulated
    
 
 
 
   
 
 
 
  
 
 
 
  
Additional
    
Retained
    
other
    
Total
  
   
Common stock
    
paid in
    
earnings
    
comprehensive
    
stockholders'
  
   
Number
    
Amount
    
capital
    
(deficit)
    
income (loss)
    
equity
  
                                                 
Balances, December 31, 2017
    
10,583,879
     $
15,368
     $
2,167
     $
42,676
     $
-
     $
60,211
  
Impact of Adoption of ASU 2014-09
    
-
      
-
      
-
      
1,063
      
-
      
1,063
  
Balance on January 1, 2018
    
10,583,879
      
15,368
      
2,167
      
43,739
      
-
      
61,274
  
Exercise of stock options
    
28,716
      
180
      
(141
 )    
-
      
-
      
39
  
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration
    
(9,229
 )    
-
      
(288
 )    
-
      
-
      
(288
 )
Stock-based compensation (note 14)
    
-
      
-
      
1,193
      
-
      
-
      
1,193
  
                                                 
                                                 
Net income
    
-
      
-
      
-
      
7,352
      
-
      
7,352
  
Accretion of redeemable non-controlling interest in Ting Virginia, LLC.
    
-
      
-
      
-
      
(64
 )    
-
      
(64
 )
Other comprehensive loss
    
-
      
-
      
-
      
-
      
(243
 )    
(243
 )
                                                 
Balances, June 30, 2018
    
10,603,366
     $
15,548
     $
2,931
     $
51,027
     $
(243
 )   $
69,263