Note 6 - Fair Value Measurements - Interest Rate Loan Contracts and Forward Contracts Fair Value Measurement (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Reported Value Measurement [Member]
Interest rate loan contracts	$ (1)	$ (11)
Forward contracts	1	1
Forward contracts	(1)	(11)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Interest rate loan contracts	(1)	(11)
Forward contracts	1	1
Forward contracts	(1)	(11)
Interest Rate Contract [Member] | Reported Value Measurement [Member]
Interest rate loan contracts	(1)
Forward contracts		1
Forward contracts	(1)
Interest Rate Contract [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Interest rate loan contracts	(1)
Forward contracts	(1)
Interest Rate Contract [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Forward contracts		1
Forward Contracts [Member] | Reported Value Measurement [Member]
Interest rate loan contracts		(11)
Forward contracts		(11)
Forward Contracts [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Interest rate loan contracts		(11)
Forward contracts	1
Forward contracts		$ (11)
Forward Contracts [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Forward contracts	$ 1