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Note 3 - Supplemental Balance Sheet Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Disclosure Text Block Supplement [Abstract]
Estimated Costs To Complete Construction In Progress	$ 472,000	$ 1,154,000
Depreciation	2,957,000	3,306,000
Number of Reportable Segments	3
Goodwill, Impairment Loss	0	0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	0	0
Amortization of Intangible Assets	$ 402,000	$ 497,000

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Estimated Costs To Complete Construction In Progress

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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