Note 2 - Acquisition (Details Textual) - Peoples Bancorp of Mt. Pleasant, Inc. [Member] - USD ($)	7 Months Ended
	Dec. 31, 2019	Jun. 13, 2019
Business Acquisition, Average Closing Share Price		$ 19.07
Business Acquisition, Aggregate Implied Transaction Value		$ 10,300,000
Forecast [Member]
Business Acquisition, Equity Interest Issued or Issuable to Each Shareholder, Number of Shares	63.16
Payments to Each Shareholder to Acquire Businesses, Gross	$ 1,200
Business Acquisition, Percentage of Total Consideration Transferred to be Paid in Common Shares	50.00%
Business Acquisition, Percentage of Total Consideration Transferred to be Paid in Cash	50.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total	$ 72,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans	54,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits	$ 62,700,000