Note 3 - Concentrations and Restrictions on Cash and Due from Banks and Interest-Bearing Deposits in Financial Institutions	12 Months Ended
Dec. 31, 2020
Notes to Financial Statements
Concentrations and Restrictions on Cash and Due from Banks and Interest Bearing Deposits in Financial Institutions [Text Block]	Note 3. Concentrations and Restrictions on Cash and Due from Banks and Interest-Bearing Deposits in Financial Institutions The Federal Reserve announced on March 15, 2020, that the reserve requirement ratios will be reduced to zero percent effective March 26, 2020. This action eliminated reserve requirements for all depository institutions. Prior to March 26, 2020, the Federal Reserve Bank requires member banks to maintain certain cash and due from bank reserves. The subsidiary banks’ did not have a reserve requirement at December 31, 2020 and the reserve requirement totaled approximately $8,734,000 at December 31, 2019. The Federal Reserve Board currently has no plans to reinstate the reserve requirement, but retains the right to reinstate it. At December 31, 2020, the Company had approximately $160,950,000 on deposit at various financial institutions. Management does not believe these balances carry a significant risk of loss but cannot provide absolute assurance that no losses would occur if these institutions were to become insolvent.

Note 3 - Concentrations and Restrictions on Cash and Due from Banks and Interest-Bearing Deposits in Financial Institutions

12 Months Ended

Dec. 31, 2020

Concentrations and Restrictions on Cash and Due from Banks and Interest Bearing Deposits in Financial Institutions [Text Block]

Note 3. Concentrations and Restrictions on Cash and Due from Banks and Interest-Bearing Deposits in Financial Institutions

The Federal Reserve announced on March 15, 2020, that the reserve requirement ratios will be reduced to zero percent effective March 26, 2020. This action eliminated reserve requirements for all depository institutions. Prior to March 26, 2020, the Federal Reserve Bank requires member banks to maintain certain cash and due from bank reserves. The subsidiary banks’ did not have a reserve requirement at December 31, 2020 and the reserve requirement totaled approximately $8,734,000 at December 31, 2019. The Federal Reserve Board currently has no plans to reinstate the reserve requirement, but retains the right to reinstate it.

At December 31, 2020, the Company had approximately $160,950,000 on deposit at various financial institutions. Management does not believe these balances carry a significant risk of loss but cannot provide absolute assurance that no losses would occur if these institutions were to become insolvent.