Note 6 - Fair Value Measurements - Interest Rate Loan Contracts and Forward Contracts Fair Value Measurement (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Reported Value Measurement [Member]
Interest rate loan contracts	$ 8
Forward contracts	(8)
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Interest rate loan contracts	0
Forward contracts	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate loan contracts	0
Forward contracts	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Interest rate loan contracts	8
Forward contracts	(8)
Interest Rate Contract [Member] | Reported Value Measurement [Member]
Interest rate loan contracts	(8)
Interest Rate Contract [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Interest rate loan contracts	0
Interest Rate Contract [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate loan contracts	0
Interest Rate Contract [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Interest rate loan contracts	(8)
Forward Contracts [Member] | Estimate of Fair Value Measurement [Member]
Forward contracts	8
Forward Contracts [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Forward contracts	0
Forward Contracts [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Forward contracts	0
Forward Contracts [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Forward contracts	$ 8