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Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) shares | Jan. 01, 2021 USD ($) | Dec. 31, 2020 USD ($)
Number Of Limited Partnerships In Housing Investments |  |  | 10
Percentage of Subsidiaries Common Securities Owned by Parent Company |  |  | 100.00%
Gross Loans Comprised of Commercial Mortgage Loans Percentage | 49.80% |  |
Residential Mortgages Properties Percentage | 25.60% |  |
Gross Loans Comprised of Commercial Loans Percentage | 18.30% |  |
Federal Home Loan Bank Stock | $ 17,250 |  | $ 17,250
Federal Home Loan Bank Stock Shares (in shares) | shares | 172,500 |  |
Minimum Stock Requirement on Outstanding Federal Home Loan Bank Borrowings Shares (in shares) | shares | 150,000 |  |
Variable Interest Entity, Primary Beneficiary, Number of Entities | 10 |  |
Goodwill, Impairment Loss | $ 0 |  |
Number of Reportable Segments | 1 |  |
Retained Earnings (Accumulated Deficit), Ending Balance | $ 1,985,168 |  | 1,789,325
Loans and Leases Receivable, Allowance, Ending Balance | $ 136,157 |  | 166,538
Off-Balance Sheet, Credit Loss, Liability, Ending Balance |  |  | $ 5,880
Accounting Standards Update 2016-13 [Member] |  |  |
Retained Earnings (Accumulated Deficit), Ending Balance |  | $ 3,100 |
Loans and Leases Receivable, Allowance, Ending Balance |  | 1,600 |
Off-Balance Sheet, Credit Loss, Liability, Ending Balance |  | $ 6,000 |
California [Member] |  |  |
Residential Mortgages Properties Percentage | 48.70% |  |

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- Definition This represents the Federal Home Loan Bank (FHLB) shares owned by the Company as of the balance sheet date. FHLB stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References No definition available. + Details
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