Note 3 - Fair Value of Financial Instruments (Details Textual) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	[1]
Derivative Assets (Liabilities), at Fair Value, Net, Total	$ (1,827)	$ (3,106)
Interest Rate Swap [Member]
Derivative Assets (Liabilities), at Fair Value, Net, Total	$ (1,800)

[1] Includes derivative assets of $122 at December 31, 2020.