XML 31 R21.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 5 - Warranty (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   
Three Months Ended
  
   
March
3
1
,
  
   
201
7
    
201
6
  
Beginning Balance
   $
2,461
     $
1,819
  
Add: Accruals for warranties issued
during the period
    
2,135
      
1,254
  
Less: Settlements made during the period
    
(1,861
)
    
(1,254
)
Ending Balance
   $
2,735
     $
1,819