Note 4 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property and equipment, gross	$ 65,252	$ 63,553
Less accumulated depreciation and amortization	(22,037)	(19,582)
Property and equipment, net	43,215	43,971
Land and Land Improvements [Member]
Property and equipment, gross	14,318	14,118
Building and Building Improvements [Member]
Property and equipment, gross	34,721	33,533
Machinery and Equipment [Member]
Property and equipment, gross	9,151	9,015
Vehicles [Member]
Property and equipment, gross	467	445
Office Equipment [Member]
Property and equipment, gross	6,301	5,963
Construction in Progress [Member]
Property and equipment, gross	$ 294	$ 479

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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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.

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