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Property And Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Property and equipment, gross $ 43,705 $ 43,419
Accumulated depreciation (22,404) (22,044)
Total property and equipment 21,301 21,375
Land [Member]    
Property and equipment, gross 1,807 1,807
Buildings And improvements [Member]    
Property and equipment, gross 16,581 16,387
Machinery And Equipment [Member]    
Property and equipment, gross 22,496 22,907
Vehicles [Member]    
Property and equipment, gross 1,203 1,298
Office Equipment [Member]    
Property and equipment, gross 716 709
Construction In Progress [Member]    
Property and equipment, gross $ 902 $ 311