Note 14 - Deferred Compensation Plans (Details Textual)	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Officer [Member]
Deferred Compensation Liability, Current and Noncurrent, Total	$ 177,000	$ 219,000
Deferred Compensation Arrangement with Individual, Compensation Expense	10,000	12,000	$ 15,000
Director [Member]
Deferred Compensation Arrangement with Individual, Maximum Contractual Term (Year)			15 years
Deferred Compensation Liability, Current and Noncurrent, Total	136,000	142,000
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 16,000	$ 17,000	$ 17,000
Peoples Bancorp, Inc [Member]
Number of Key Employees	3
Deferred Compensation Arrangement with Individual, Maximum Contractual Term (Year)	10 years