Note 4 - Loans Receivable - Aging of the Recorded Investment of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Loans receivable	$ 1,233,287	$ 1,050,638
Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	5,564	6,876
Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	5,901	6,188
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	646	750
Financial Asset, Past Due [Member]
Loans receivable	12,111	13,814
Financial Asset, Not Past Due [Member]
Loans receivable	1,221,176	1,036,824
Construction and Land Loans [Member]
Loans receivable	160	0
Construction and Land Loans [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	0
Construction and Land Loans [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	0
Construction and Land Loans [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0
Construction and Land Loans [Member] \| Financial Asset, Past Due [Member]
Loans receivable	0
Construction and Land Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	160
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Owner Occupied [Member]
Loans receivable	18,341	24,131
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Owner Occupied [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	430	181
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Owner Occupied [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	19	250
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Owner Occupied [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	72	367
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Owner Occupied [Member] \| Financial Asset, Past Due [Member]
Loans receivable	521	798
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Owner Occupied [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	17,820	23,333
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Non-owner Occupied [Member]
Loans receivable	4,753	6,002
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Non-owner Occupied [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	1	2
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Non-owner Occupied [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	0	9
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Non-owner Occupied [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Non-owner Occupied [Member] \| Financial Asset, Past Due [Member]
Loans receivable	1	11
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Non-owner Occupied [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	4,752	5,991
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member]
Loans receivable	536,295	426,136
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| ILLINOIS
Loans receivable	310,172	235,870
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Other [Member]
Loans receivable	226,123	190,266
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, 30 to 59 Days Past Due [Member] \| ILLINOIS
Loans receivable	31	189
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, 30 to 59 Days Past Due [Member] \| Other [Member]
Loans receivable	0	0
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, 60 to 89 Days Past Due [Member] \| ILLINOIS
Loans receivable	0	0
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, 60 to 89 Days Past Due [Member] \| Other [Member]
Loans receivable	0	0
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| ILLINOIS
Loans receivable	0	0
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Other [Member]
Loans receivable	0	0
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, Past Due [Member] \| ILLINOIS
Loans receivable	31	189
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, Past Due [Member] \| Other [Member]
Loans receivable	0	0
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, Not Past Due [Member] \| ILLINOIS
Loans receivable	310,141	235,681
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, Not Past Due [Member] \| Other [Member]
Loans receivable	226,123	190,266
Real Estate Portfolio [Member] \| Nonresidential Real Estate [Member]
Loans receivable	119,660	103,172
Real Estate Portfolio [Member] \| Nonresidential Real Estate [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	0	0
Real Estate Portfolio [Member] \| Nonresidential Real Estate [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	0	0
Real Estate Portfolio [Member] \| Nonresidential Real Estate [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	297
Real Estate Portfolio [Member] \| Nonresidential Real Estate [Member] \| Financial Asset, Past Due [Member]
Loans receivable	0	297
Real Estate Portfolio [Member] \| Nonresidential Real Estate [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	119,660	102,875
Commercial Portfolio Segment [Member]
Loans receivable	552,494	489,512
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member]
Loans receivable	76,716	67,995
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	0	0
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	0	0
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member] \| Financial Asset, Past Due [Member]
Loans receivable	0	0
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	76,716	67,995
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member]
Loans receivable	20,035	19,400
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	106	26
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	4	6
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	10
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member] \| Financial Asset, Past Due [Member]
Loans receivable	110	42
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	19,925	19,358
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member]
Loans receivable	211,506	178,462
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	2,030	3,160
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	5,106	4,718
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member] \| Financial Asset, Past Due [Member]
Loans receivable	7,136	7,878
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	204,370	170,584
Finance Leases Portfolio Segment [Member] \| Investment Rated Commercial Leases [Member]
Loans receivable	57,885	82,626
Finance Leases Portfolio Segment [Member] \| Investment Rated Commercial Leases [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	0	290
Finance Leases Portfolio Segment [Member] \| Investment Rated Commercial Leases [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	81	1,201
Finance Leases Portfolio Segment [Member] \| Investment Rated Commercial Leases [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	127	0
Finance Leases Portfolio Segment [Member] \| Investment Rated Commercial Leases [Member] \| Financial Asset, Past Due [Member]
Loans receivable	208	1,491
Finance Leases Portfolio Segment [Member] \| Investment Rated Commercial Leases [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	57,677	81,135
Finance Leases Portfolio Segment [Member] \| Other [Member]
Loans receivable	95,606	88,851
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	2,346	3,015
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	334	0
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	438	76
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, Past Due [Member]
Loans receivable	3,118	3,091
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	92,488	85,760
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member]
Loans receivable	55,910	40,582
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	534	0
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	353	0
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member] \| Financial Asset, Past Due [Member]
Loans receivable	887	0
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	55,023	40,582
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member]
Loans receivable	34,836	11,596
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	74	0
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	0	0
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	4	0
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member] \| Financial Asset, Past Due [Member]
Loans receivable	78	0
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	34,758	11,596
Consumer Portfolio Segment [Member]
Loans receivable	1,584	1,685
Consumer Portfolio Segment [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	12	13
Consumer Portfolio Segment [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	4	4
Consumer Portfolio Segment [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	5	0
Consumer Portfolio Segment [Member] \| Financial Asset, Past Due [Member]
Loans receivable	21	17
Consumer Portfolio Segment [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	$ 1,563	$ 1,668

Note 4 - Loans Receivable - Aging of the Recorded Investment of Loans (Details) - USD ($)
$ in Thousands

Dec. 31, 2022

Dec. 31, 2021

Loans receivable

$ 1,233,287

$ 1,050,638

Financial Asset, 30 to 59 Days Past Due [Member]

Loans receivable

5,564

6,876

Financial Asset, 60 to 89 Days Past Due [Member]

Loans receivable