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Note 4 - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Construction Equipment [Member]
Property, plant and equipment, gross	$ 116,221	$ 129,150
Transportation Equipment [Member]
Property, plant and equipment, gross	17,864	18,205
Building [Member]
Property, plant and equipment, gross	10,796	10,777
Office Equipment [Member]
Property, plant and equipment, gross	2,810	2,761
Leasehold Improvements [Member]
Property, plant and equipment, gross	894	878
Construction in Progress [Member]
Property, plant and equipment, gross	1,823	387
Land [Member]
Property, plant and equipment, gross	4,257	5,530
Water Rights [Member]
Property, plant and equipment, gross	200	200
Property, plant and equipment, gross	154,865	167,888
Less accumulated depreciation	(80,315)	(80,790)
	$ 74,550	$ 87,098

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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- Definition

Amount before accumulated depreciation, depletion and amortization of 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, and furniture and fixtures.

+ References

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



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+ References

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



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