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Note 1 - General (Tables)
 9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
    Assets as of
September 30, 2016
(unaudited)		   Liabilities as of
December 31, 2015
    Notional
Amount		   Fair
Value		   Notional
Amount		   Fair
Value
                                 
Foreign exchange forward contract derivatives in cash flow hedging relationships - included in other current assets and accrued expenses and other liabilities   $ 13,289     $ 379     $ 36,070     $ (331 )