Note 12 - Guarantees (Detail) - Warranty Liability (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Balance - Beginning of period	$ 214	$ 274
Acquisition of Thermonics	67
Payments made under warranty	(141)	(182)
Accruals for product warranty	57	122
Balance - End of period	$ 197	$ 214

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers.

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