Note 13 - Commitments and Off-balance-sheet Risk (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Reserve or Liability Balance for Financial Instruments With Off Balance Sheet Risk	$ 0	$ 0
Term Debt, Secured by Real Estate Balloon Payment, Period (Year)	5 years
Minimum [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate	3.00%
Amortization Period for Term Debt, Secured by Real Estate (Year)	10 years
Interest Rates on Loans, Secured by Non-real Estate Collateral	3.50%
Term Debt Secured, by Non-real Estate Collateral Maturity Period (Year)	3 years
Maximum [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate	5.00%
Amortization Period for Term Debt, Secured by Real Estate (Year)	20 years
Interest Rates on Loans, Secured by Non-real Estate Collateral	5.00%
Term Debt Secured, by Non-real Estate Collateral Maturity Period (Year)	7 years