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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross $ 106,450 $ 99,210  
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment (77,448) (73,385)  
Property, Plant and Equipment, Net 29,002 25,825  
Depreciation 4,099 4,384 $ 4,097
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 524 524  
Building and Building Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 9,263 9,117  
Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 83,578 75,084  
Furniture and Fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 3,137 2,955  
Power plants for use under PPA's [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 0 996  
Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross $ 9,948 $ 10,534