Note 10 - Benefits Plans - Plan Assets and Liabilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Balance, Plan Asset	$ 15,821
Projected benefit obligation	15,328
Pension Plan [Member]
Balance, Plan Asset	14,705
Actual return on plan assets	1,618
Company contributions	0
Settlements and curtailments	0
Benefits paid	(502)
Federal subsidy on benefits paid	0
Balance, Plan Asset	15,821
Balance, Plan Obligation	14,197
Service cost	0
Interest cost	304
Plan amendments	0
Settlements and curtailments	0
Actuarial loss	1,329
Benefits paid	(502)
Federal subsidy on benefits paid	0
Balance, Plan Obligation	15,328
Other assets	493
Accumulated other comprehensive income	(1,852)
Net amount recognized, December 31	2,345
Accumulated benefit obligation	15,328
Overfunded (underfunded) status of ABO	493
Provision for future salaries	0
Projected benefit obligation	$ 15,328
Discount rate	2.65%
Interest-crediting rate	0.00%