Note 10 - Commitments and Contingencies - Outstanding Commitments to Originate Loans (Details) - USD ($) $ in Thousands  | 
Mar. 31, 2022  | 
Dec. 31, 2021  | 
|---|---|---|
| Total commitments | $ 3,848 | $ 4,220 | 
| Unused Line of Credit [Member] | ||
| Total commitments | 3,751 | 4,001 | 
| Commitments to Extend Credit [Member] | ||
| Total commitments | $ 97 | $ 219 | 
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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. No definition available. 
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