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Note 12 - Segment Information (Detail) - Segment Information Identifiable Assets & Long Lived Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Identifiable Assets	$ 32,603	$ 32,399
Long-Lived Assets	1,179	1,250
Thermal Products [Member]
Identifiable Assets	21,990	20,849
Mechanical Products [Member]
Identifiable Assets	6,951	7,737
Electrical Products [Member]
Identifiable Assets	3,662	3,813
UNITED STATES
Long-Lived Assets	871	899
Foreign [Member]
Long-Lived Assets	$ 308	$ 351

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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