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, 2020	Dec. 31, 2019
Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments		$ 0	$ 138
Derivatives designated as hedging instruments		8,464	4,459
Not Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments		0	459
Derivatives designated as hedging instruments		1,607	70
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments	[1]	0	0
Derivatives designated as hedging instruments	[1]	8,464	4,459
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments	[2]	0	459
Derivatives designated as hedging instruments	[2]	1,607	70
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments	[3]	0	138
Derivatives designated as hedging instruments	[3]	$ 0	$ 0

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

[2] Recorded in prepaid expenses and other current assets, and accounts payable and accrued expenses.

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