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Note 10 - Borrowings - Maturity of Borrowings (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Jun. 29, 2018	Dec. 22, 2016
2022	$ 12,206,000
2023	60,210,000
2024	30,375,000
2025	0
2026	0
Thereafter	18,248,000
Total contractual maturities of borrowings	121,039,000
Unamortized debt issuance costs	(318,000)
Balance of borrowings as of December 31, 2021	120,721,000	$ 120,800,000
Federal Home Loan Bank Advances [Member]
2022	0
2023	60,000,000
2024	30,000,000
2025	0
2026	0
Thereafter	0
Total contractual maturities of borrowings	90,000,000
Unamortized debt issuance costs	0
Balance of borrowings as of December 31, 2021	90,000,000
Senior Notes [Member]
2022	12,000,000
2023	0
2024	0
2025	0
2026	0
Thereafter	0
Total contractual maturities of borrowings	12,000,000
Unamortized debt issuance costs	0	(73,000)		$ (374,000)
Balance of borrowings as of December 31, 2021	12,000,000
Subordinated Debt [Member]
2022	0
2023	0
2024	0
2025	0
2026	0
Thereafter	10,000,000
Total contractual maturities of borrowings	10,000,000
Unamortized debt issuance costs	(189,000)	(218,000)	$ (291,000)
Balance of borrowings as of December 31, 2021	9,811,000
Junior Subordinated Debt [Member]
2022	0
2023	0
2024	0
2025	0
2026	0
Thereafter	8,248,000
Total contractual maturities of borrowings	8,248,000
Unamortized debt issuance costs	(129,000)	(138,000)
Balance of borrowings as of December 31, 2021	8,119,000
Notes Payable, Other Payables [Member]
2022	206,000
2023	210,000
2024	375,000
2025	0
2026	0
Thereafter	0
Total contractual maturities of borrowings	791,000	$ 994,000
Unamortized debt issuance costs	0
Balance of borrowings as of December 31, 2021	$ 791,000