Note 4 - Loans Receivable - Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing receivables on nonaccrual status	$ 12,025	$ 13,799
Residential Portfolio Segment [Member]
Financing receivables on nonaccrual status	4,180	6,390
Home Equity Portfolio Segment [Member]
Financing receivables on nonaccrual status	495	476
Commercial Real Estate Portfolio Segment [Member]
Financing receivables on nonaccrual status	6,521	5,390
Construction and Land Development Portfolio Segment [Member]
Financing receivables on nonaccrual status	0	0
Multifamily Portfolio Segment [Member]
Financing receivables on nonaccrual status	400	504
Farmland Portfolio Segment [Member]
Financing receivables on nonaccrual status	0	0
Commercial Portfolio Segment [Member]
Financing receivables on nonaccrual status	429	1,039
Consumer Portfolio Segment [Member]
Financing receivables on nonaccrual status	0	0
Manufactured Homes Portfolio Segment [Member]
Financing receivables on nonaccrual status	0	0
Government Portfolio Segment [Member]
Financing receivables on nonaccrual status	$ 0	$ 0