Note 6 - Financial Instruments and Fair Value Measurements - Derivatives Recognized in Condensed Consolidation Financial Statements (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Total	[1]	$ 125	$ (1,214)	$ 2,418	$ (1,665)
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Foreign exchange forward contracts	[2]	(516)		972
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Foreign exchange forward contracts	[1]	501	(1,141)	1,157	(1,592)
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member]
Foreign exchange forward contracts	[2]	$ 140	$ (73)	$ 289	$ (73)

[1] Gains (losses) related to derivative instruments are expected to be largely offset by (losses) gains on the underlying exposures being hedged. During the three and six months ended June 30, 2019, a gain of $0.5 million and $1.2 million, respectively, was recognized in gain (loss) on foreign currency. During the three and six months ended June 30, 2018, a loss of $1.1 million and $1.6 million, respectively, was recognized in gain (loss) on foreign currency.

[2] Recognized, net of tax, as a component of other comprehensive income (loss) within stockholders' equity.