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Note D - Product Warranties - Product Warranties (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Balance at beginning of year $ 1,380 $ 1,166
Provision 1,572 1,104
Claims (1,418) (1,003)
Balance at end of period $ 1,534 $ 1,267