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Note A - Product Warranties (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Balance at beginning of year $ 1,166 $ 1,170 $ 1,133
Provision 1,732 1,607 1,220
Claims (1,518) (1,611) (1,183)
Balance at end of year $ 1,380 $ 1,166 $ 1,170