Note 15 - Derivative Financial Instruments - Summary of Fair Value Amounts of Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivative assets	$ 261	$ 3,648
Derivative liabilities	4,899	1,929
Net derivative assets (liabilities)	(4,638)	1,719
Designated as Hedging Instrument [Member]
Derivative assets	261	3,648
Derivative liabilities	4,899	1,885
Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member] | Interest Rate Swap [Member]
Derivative assets	261	3,648
Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member] | Interest Rate Swap [Member]
Derivative liabilities	4,899	1,885
Not Designated as Hedging Instrument [Member]
Derivative liabilities	0	44
Not Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member] | Foreign Exchange Forward [Member]
Derivative liabilities	$ 0	$ 44