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Note 11 - Plant Considerations - Restructuring Charges Associated with the Massachusetts Consolidations (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Newburyport, Massachusetts Facility [Member]        
Employee severance $ 204,000 $ 204,000
Relocation 25,000 286,000 203,000 310,000
Lease termination 361,000 361,000
Total $ 25,000 $ 851,000 203,000 $ 875,000
Total     $ 1,900,000