Note 1 - Nature of Operations and Summary of Significant Accounting Policies - Capital Amounts and Ratios (Details) - Bank [Member] $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Bank Leverage Capital, Actual	$ 120,011	$ 111,098
Bank Leverage Capital, Ratio	0.101	0.100
Bank Leverage Capital, to be Well Capitalized	$ 101,414	$ 89,175
Bank Leverage Capital, to be Well Capitalized, Ratio	0.085	0.080