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Note C - Product Warranties
9 Months Ended
Sep. 30, 2012
Product Warranty Disclosure [Text Block]
NOTE C - PRODUCT WARRANTIES

A liability is established for estimated future warranty and service claims based on historical claims experience, specific product failures and sales volume.  The Company expenses warranty costs directly to cost of products sold.  Changes in the Company’s product warranty liability are as follows:

(Thousands of dollars)
September 30,
 
2012
 
2011
Balance at beginning of year
$1,228
 
$1,543
Provision
1,059
 
848
Claims
(1,117)
 
(1,034)
Balance at end of period
$1,170
 
$1,357