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Note M - Contingencies (Detail) - Warranty Liability (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Aggregate product warranty liability at beginning of period	$ 776	$ 313
Net aggregate expense related to product warranties	(10)	120
Aggregate reductions for payments	(20)	(100)
Aggregate product warranty liability at end of period	$ 746	$ 333

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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