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Note 7 - Restructuring (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2015
Facility Closing [Member]        
Restructuring Charges   $ 307,000    
Employee Severance [Member]        
Restructuring Charges $ 506,000      
Accrued Liabilities, Current [Member]        
Restructuring Charges 498,000     $ 114,000
Other Noncurrent Liabilities [Member]        
Restructuring Charges 246,000     $ 193,000
Restructuring Charges $ 586,000 $ 496,000