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Note 3 - Restructuring Charges (Details Textual) - USD ($)
Aug. 15, 2014
Apr. 01, 2017
Oct. 01, 2016
Restructuring Reserve, Current   $ 97,000 $ 239,000
Accounts Payable, Current   35,605,000 42,759,000
Accrued Liabilities, Current   7,222,000 11,024,000
ASW Acquisition [Member]      
Business Combination, Consideration Transferred $ 33,500,000    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred $ 480,000    
Restructuring Reserve, Current   $ 100,000 300,000
Accounts Payable, Current     100,000
Accrued Liabilities, Current     $ 200,000