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Note 6. Accrued Expenses (Detail) - Warranty Provision Roll Forward (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Beginning Balance	$ 87	$ 75
Additions	127	212
Payments	(143)	(200)
Balance at end of year	$ 71	$ 87

- 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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