Note 3 - Loans (Details Textual) - USD ($)  | 
Dec. 31, 2021  | 
Dec. 31, 2020  | 
|---|---|---|
| Impaired Financing Receivable, Unpaid Principal Balance, Total | $ 1,392,000 | $ 2,895,000 | 
| Escrow Deposit | 270,000 | 268,000 | 
| Loans and Leases Receivable, Related Parties, Ending Balance | 556,000 | 928,000 | 
| First Mortgage Loans [Member] | ||
| Impaired Financing Receivable, Unpaid Principal Balance, Total | $ 15,800,000 | $ 16,000,000.0 | 
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- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Details 
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