Note 4 - Loans Receivable - Aging of the Recorded Investment of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loans receivable	$ 1,148,334	$ 1,050,638
Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	5,044	6,876
Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	7,523	6,188
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	1,630	750
Financial Asset, Past Due [Member]
Loans receivable	14,197	13,814
Financial Asset, Not Past Due [Member]
Loans receivable	1,134,137	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	19,941	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	5	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	23	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	693	367
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Owner Occupied [Member] \| Financial Asset, Past Due [Member]
Loans receivable	721	798
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Owner Occupied [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	19,220	23,333
Real Estate Portfolio [Member] \| One-to-Four Family Residential Real Estate, Non-owner Occupied [Member]
Loans receivable	4,543	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	4,542	5,991
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member]
Loans receivable	481,838	426,136
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| ILLINOIS
Loans receivable	289,856	235,870
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Other [Member]
Loans receivable	191,982	190,266
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, 30 to 59 Days Past Due [Member] \| ILLINOIS
Loans receivable	0	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	299	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	299	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	289,557	235,681
Real Estate Portfolio [Member] \| Multi-family Mortgage [Member] \| Financial Asset, Not Past Due [Member] \| Other [Member]
Loans receivable	191,982	190,266
Real Estate Portfolio [Member] \| Nonresidential Real Estate [Member]
Loans receivable	115,820	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	115,820	102,875
Commercial Portfolio Segment [Member]
Loans receivable	523,669	489,512
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member]
Loans receivable	74,007	67,995
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	225	0
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	14	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	239	0
Commercial Portfolio Segment [Member] \| Commercial Lines and Loans for Operations [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	73,768	67,995
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member]
Loans receivable	19,811	19,400
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	52	26
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	94	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	415	10
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member] \| Financial Asset, Past Due [Member]
Loans receivable	561	42
Commercial Portfolio Segment [Member] \| Asset-based and Factored Receivables [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	19,250	19,358
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member]
Loans receivable	193,464	178,462
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	3,572	3,160
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	7,088	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	149	0
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member] \| Financial Asset, Past Due [Member]
Loans receivable	10,809	7,878
Finance Leases Portfolio Segment [Member] \| Equipment Finance Leases, Government [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	182,655	170,584
Finance Leases Portfolio Segment [Member] \| Investment Rated Commercial Leases [Member]
Loans receivable	61,735	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	0	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	42	0
Finance Leases Portfolio Segment [Member] \| Investment Rated Commercial Leases [Member] \| Financial Asset, Past Due [Member]
Loans receivable	42	1,491
Finance Leases Portfolio Segment [Member] \| Investment Rated Commercial Leases [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	61,693	81,135
Finance Leases Portfolio Segment [Member] \| Other [Member]
Loans receivable	88,129	88,851
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	1,179	3,015
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	0	0
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	331	76
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, Past Due [Member]
Loans receivable	1,510	3,091
Finance Leases Portfolio Segment [Member] \| Other [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	86,619	85,760
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member]
Loans receivable	55,409	40,582
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	0	0
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	0	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	0	0
Finance Leases Portfolio Segment [Member] \| Middle Market Leases [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	55,409	40,582
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member]
Loans receivable	31,114	11,596
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	4	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	0	0
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member] \| Financial Asset, Past Due [Member]
Loans receivable	4	0
Finance Leases Portfolio Segment [Member] \| Small Ticket Leases [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	31,110	11,596
Consumer Portfolio Segment [Member]
Loans receivable	2,363	1,685
Consumer Portfolio Segment [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	6	13
Consumer Portfolio Segment [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	5	4
Consumer Portfolio Segment [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Consumer Portfolio Segment [Member] \| Financial Asset, Past Due [Member]
Loans receivable	11	17
Consumer Portfolio Segment [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	$ 2,352	$ 1,668

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

Sep. 30, 2022

Dec. 31, 2021

Loans receivable

$ 1,148,334

$ 1,050,638

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

Loans receivable

5,044

6,876

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

Loans receivable