Note 15 - Financial Derivatives - Cash Flow Swap Hedges (Details) - Interest Rate Swap [Member] - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Notional		$ 119,136		$ 119,136		$ 119,136
Weighted average fixed rate-pay		2.61%		2.61%		2.61%
Weighted average variable rate-receive		0.16%		0.16%		0.44%
Unrealized loss, net of taxes	[1]			$ (5,188)		$ (6,890)
Periodic net settlement of swaps	[2]	$ 731	$ 514	$ 1,442	$ 769

[1] Included in other comprehensive income.

[2] the amount of periodic net settlement of interest rate swaps was included in interest expense.