XML 45 R20.htm IDEA: XBRL DOCUMENT v3.20.1
Note 6 - Product Warranties (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   
March 31
,
 
   
2020
   
2019
 
Balance at beginning of year
  $
1,438
    $
1,380
 
Provision
   
294
     
479
 
Claims
   
(302
)
   
(355
)
Balance at end of period
  $
1,430
    $
1,504