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Note C - Product Warranties (Detail) - Product Warranties (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Sep. 30, 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