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Note 12 - Debt - Subordinated Borrowings (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Delaware Statutory Trust III [Member] |  |
Principal | $ 15.0 | $ 15.0
Delaware Statutory Trust III [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] |  |
Debt Instrument, Basis Spread on Variable Rate | 4.20% |
Delaware Statutory Trust III [Member] | London Interbank Offered Rate [Member] |  |
Debt Instrument, Basis Spread on Variable Rate |  | 4.20%
Connecticut Statutory Trust I [Member] |  |
Principal |  | $ 15.0
Connecticut Statutory Trust I [Member] | London Interbank Offered Rate [Member] |  |
Debt Instrument, Basis Spread on Variable Rate |  | 4.00%
Connecticut Statutory Trust II [Member] |  |
Principal |  | $ 17.5
Connecticut Statutory Trust II [Member] | London Interbank Offered Rate [Member] |  |
Debt Instrument, Basis Spread on Variable Rate |  | 4.10%
Connecticut Statutory Trust III [Member] |  |
Principal |  | $ 20.0
Connecticut Statutory Trust III [Member] | London Interbank Offered Rate [Member] |  |
Debt Instrument, Basis Spread on Variable Rate |  | 3.95%
Delaware Statutory Trust IV [Member] |  |
Principal |  | $ 10.0
Delaware Statutory Trust IV [Member] | London Interbank Offered Rate [Member] |  |
Debt Instrument, Basis Spread on Variable Rate |  | 3.85%
Delaware Statutory Trust VI [Member] |  |
Principal |  | $ 13.0
Delaware Statutory Trust VI [Member] | London Interbank Offered Rate [Member] |  |
Debt Instrument, Basis Spread on Variable Rate |  | 4.00%

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