6. Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, plant and equipment, gross	$ 98,161us-gaap_PropertyPlantAndEquipmentGross	$ 84,748us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation and amortization	(35,519)	(32,412)
Property, plant and equipment	62,642us-gaap_PropertyPlantAndEquipmentOther	52,336us-gaap_PropertyPlantAndEquipmentOther
Construction in progress	5,769us-gaap_ConstructionInProgressGross	11,371us-gaap_ConstructionInProgressGross
Land	1,101us-gaap_Land	1,101us-gaap_Land
Property, plant and equipment, net	69,512us-gaap_PropertyPlantAndEquipmentNet	64,808us-gaap_PropertyPlantAndEquipmentNet
Land improvements [Member]
Property, plant and equipment, gross	103	103
Building and improvements [Member]
Property, plant and equipment, gross	25,056	16,196
Machinery and equipment [Member]
Property, plant and equipment, gross	65,384	61,529
Furniture and fixtures [Member]
Property, plant and equipment, gross	1,974	1,938
Computer rquipment and software [Member]
Property, plant and equipment, gross	5,372	4,712
Transportation equipment [Member]
Property, plant and equipment, gross	$ 272	$ 270

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

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

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- Definition

Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

+ References

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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.

+ References

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

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services 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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Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.

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