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Note 7 - Restructuring (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Sep. 30, 2015
Employee Severance and Termination Benefits and Lease Terminations [Member]            
Restructuring Charges $ 158     $ 744    
Accrued Liabilities, Current [Member]            
Restructuring Reserve 528     528   $ 114
Other Noncurrent Liabilities [Member]            
Restructuring Reserve 210     210   193
Restructuring Charges 194 $ 586 780 496
Restructuring Reserve $ 738 $ 744   $ 738   $ 307