Note 6 - Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

	Asset Derivatives as of			Liability Derivatives as of
	September 30, 2018			September 30, 2018
	Balance Sheet			Balance Sheet
	Location	Fair Value		Location	Fair Value
Derivative instruments designated as hedging instruments:
Foreign currency contracts	Other current assets	$	1,757	Other current liabilities		--
Interest rate swap contract	Other current assets		3,636	Other current liabilities		--
		$	5,393			--

	Asset Derivatives as of			Liability Derivatives as of
	December 31, 2017			December 31, 2017
	Balance Sheet			Balance Sheet
	Location	Fair Value		Location	Fair Value
Derivative instruments designated as hedging instruments:
Interest rate swap contract	Other current assets	$	904	Other current liabilities		--

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Gain (Loss) Recognized in Accumulated
Three months ended September 30, 2018	Other Comprehensive Income
Foreign currency contracts	$	(167	)
Interest rate swap contract	$	453

	Gain (Loss) Recognized in Accumulated
Nine months ended September 30, 2018	Other Comprehensive Income
Foreign currency contracts	$	(167	)
Interest rate swap contract	$	2,732