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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%

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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