Note 6 - Financial Instruments and Fair Value Measurements - Estimated Fair Values of Derivative Instruments (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments		$ 420	$ 710
Derivatives designated as hedging instruments		1,536
Not Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments
Derivatives designated as hedging instruments		171	1,328
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments	[1]
Derivatives designated as hedging instruments	[1]	1,536
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments	[2]
Derivatives designated as hedging instruments		171	1,328
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments	[3]	420	710
Derivatives designated as hedging instruments	[3]

[1] Recorded in accounts payable and accrued expenses and other long-term liabilities.

[2] Recorded in accounts payable and accrued expenses.

[3] Recorded in prepaid expenses and other current assets and other long-term assets.