Note 11 - Debt - Subordinated Borrowings (Details)	9 Months Ended
	Sep. 30, 2021 USD ($)
Connecticut Statutory Trust I [Member]
Principal	$ 15,000
Connecticut Statutory Trust I [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest	4.00%
Connecticut Statutory Trust II [Member]
Principal	$ 17,500
Connecticut Statutory Trust II [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest	4.10%
Connecticut Statutory Trust III [Member]
Principal	$ 20,000
Connecticut Statutory Trust III [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest	3.95%
Delaware Statutory Trust III [Member]
Principal	$ 15,000
Delaware Statutory Trust III [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest	4.20%
Delaware Statutory Trust IV [Member]
Principal	$ 10,000
Delaware Statutory Trust IV [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest	3.85%
Delaware Statutory Trust VI [Member]
Principal	$ 13,000
Delaware Statutory Trust VI [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest	4.00%