XML 32 R22.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 6 - Deferred Service Contract Revenue (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
Deferred Revenue, by Arrangement, Disclosure [Table Text Block]
   
Three Months Ended
  
   
March
3
1
,
  
   
201
7
    
201
6
  
Beginning Balance
   $
9,431
     $
10,469
  
Add: Payments received
    
3,391
      
3,263
  
Less: Revenue
recognized
    
(3,267
)
    
(3,220
)
Ending Balance
   $
9,555
     $
10,512