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Note 3 - Morganton Sale (Details Textual) - USD ($)
12 Months Ended
Jul. 09, 2015
Dec. 31, 2015
Sep. 30, 2015
Morganton [Member] | Certain Assets [Member]      
Proceeds from Sales of Business, Affiliate and Productive Assets $ 10,500,000    
Morganton [Member] | Certain Assets and Liabilities [Member]      
Proceeds from Sales of Business, Affiliate and Productive Assets 2,000,000    
Morganton [Member] | Morganton Facility [Member]      
Proceeds from Sales of Business, Affiliate and Productive Assets 3,200,000    
Morganton [Member]      
Proceeds from Sales of Business, Affiliate and Productive Assets 15,700,000    
Gain (Loss) on Disposition of Business 7,744,000    
Meritor Note Amendment [Member]      
Secured Debt $ 412,000   $ 321,000
Gain (Loss) on Disposition of Business   $ 7,744,000