Note 8 - Other Borrowings (Details Textual) - USD ($) $ in Thousands  | 
12 Months Ended | ||
|---|---|---|---|
May 21, 2021  | 
Dec. 31, 2021  | 
Dec. 31, 2020  | 
|
| Proceeds from FHLBank Borrowings, Financing Activities | $ 5,000 | $ 5,000 | $ 4,000 | 
| Payments of FHLBank Borrowings, Financing Activities | $ 4,000 | 4,000 | (0) | 
| Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available | 60,800 | 61,100 | |
| Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | $ 76,800 | $ 77,300 | |
| X | ||||||||||
- Definition Amount of the collateral pledged in support of federal home loan bank advances outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
  | 
| X | ||||||||||
- Definition Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
  | 
| X | ||||||||||
- Definition Amount of cash inflow from Federal Home Loan Bank (FHLBank) borrowing, classified as financing activity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
  | 
| X | ||||||||||
- Definition Amount of cash outflow for repayment of Federal Home Loan Bank (FHLBank) borrowing, classified as financing activity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
  |