Note 3 - Business Combination and Pending Acquisition - Monument Bancorp, Inc. - Loans Acquired (Details) - Monument Bancorp, Inc [Member]	Apr. 01, 2019 USD ($)
Loans acquired	$ 259,295,000
Residential Portfolio Segment [Member]
Loans acquired	113,339,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member]
Loans acquired	107,722,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member]
Loans acquired	2,433,000
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Loans acquired	2,674,000
Residential Portfolio Segment [Member] | Construction Loans [Member]
Loans acquired	510,000
Commercial Portfolio Segment [Member]
Loans acquired	144,968,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans acquired	114,185,000
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans acquired	4,617,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans acquired	7,571,000
Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member]
Loans acquired	267,000
Commercial Portfolio Segment [Member] | Multifamily 5 or More Residential [Member]
Loans acquired	17,493,000
Commercial Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans acquired	835,000
Consumer Portfolio Segment [Member]
Loans acquired	988,000
Financial Asset Acquired and No Credit Deterioration [Member]
Loans acquired	258,854,000
Financial Asset Acquired and No Credit Deterioration [Member] | Residential Portfolio Segment [Member]
Loans acquired	113,262,000
Financial Asset Acquired and No Credit Deterioration [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member]
Loans acquired	107,645,000
Financial Asset Acquired and No Credit Deterioration [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member]
Loans acquired	2,433,000
Financial Asset Acquired and No Credit Deterioration [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Loans acquired	2,674,000
Financial Asset Acquired and No Credit Deterioration [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Loans acquired	510,000
Financial Asset Acquired and No Credit Deterioration [Member] | Commercial Portfolio Segment [Member]
Loans acquired	144,604,000
Financial Asset Acquired and No Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans acquired	113,821,000
Financial Asset Acquired and No Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans acquired	4,617,000
Financial Asset Acquired and No Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans acquired	7,571,000
Financial Asset Acquired and No Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member]
Loans acquired	267,000
Financial Asset Acquired and No Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Multifamily 5 or More Residential [Member]
Loans acquired	17,493,000
Financial Asset Acquired and No Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans acquired	835,000
Financial Asset Acquired and No Credit Deterioration [Member] | Consumer Portfolio Segment [Member]
Loans acquired	988,000
Financial Asset Acquired with Credit Deterioration [Member]
Loans acquired	441,000
Financial Asset Acquired with Credit Deterioration [Member] | Residential Portfolio Segment [Member]
Loans acquired	77,000
Financial Asset Acquired with Credit Deterioration [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member]
Loans acquired	77,000
Financial Asset Acquired with Credit Deterioration [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member]
Loans acquired	0
Financial Asset Acquired with Credit Deterioration [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Loans acquired	0
Financial Asset Acquired with Credit Deterioration [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Loans acquired	0
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member]
Loans acquired	364,000
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans acquired	364,000
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans acquired	0
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans acquired	0
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member]
Loans acquired	0
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Multifamily 5 or More Residential [Member]
Loans acquired	0
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans acquired	0
Financial Asset Acquired with Credit Deterioration [Member] | Consumer Portfolio Segment [Member]
Loans acquired	$ 0