Stockholders' Equity and Regulatory Matters (Schedule of Compliance with Regulatory Capital Requirements) (Details) - The Juniata Valley Bank [Member] $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital, Amount		$ 65,861
Total Capital, Ratio		15.85
Total Capital, Minimum Requirement for Capital Adequacy Purposes, Amount		$ 33,244
Total Capital, Minimum Requirement for Capital Adequacy Purposes, Ratio		8.00
Total Capital, Minimum Capital Adequacy With Capital Buffer, Amount		$ 43,633
Total Capital, Minimum Capital Adequacy With Capital Buffer, Ratio		10.50
Total Capital, Minimum Regulatory Requirements to be "Well Capitalized", Amount		$ 41,555
Total Capital, Minimum Regulatory Requirements to be "Well Capitalized", Ratio		10.00
Tier 1 Capital, Amount		$ 62,900
Tier 1 Capital, Ratio		15.14
Tier 1 Capital, Minimum Requirement for Capital Adequacy Purposes, Amount		$ 24,933
Tier 1 Capital, Minimum Requirement for Capital Adequacy Purposes, Ratio		6.00
Tier One Risk Based Capital Minimum Capital Adequacy With Capital Buffer, Amount		$ 35,322
Tier One Risk Based Capital Minimum Capital Adequacy With Capital Buffer, Ratio		8.50
Tier 1 Capital, Minimum Regulatory Requirements to be "Well Capitalized", Amount		$ 33,244
Tier 1 Capital, Minimum Regulatory Requirements to be "Well Capitalized", Ratio		8.00
Common Equity Tier 1 Capital, Amount		$ 62,900
Common Equity Tier 1 Capital, Ratio		15.14
Common Equity Tier 1 Capital, Minimum Requirement for Capital Adequacy Purposes, Amount		$ 18,700
Common Equity Tier 1 Capital, Minimum Requirement for Capital Adequacy Purposes, Ratio		4.50
Common Equity Tier 1 Capital, Minimum Capital Adequacy With Capital Buffer, Amount		$ 29,089
Common Equity Tier 1 Capital, Minimum Capital Adequacy With Capital Buffer, Ratio		7.00
Common Equity Tier 1 Capital, Minimum Regulatory Requirements to be "Well Capitalized", Amount		$ 27,011
Common Equity Tier 1 Capital, Minimum Regulatory Requirements to be "Well Capitalized", Ratio		6.50
Tier 1, Leverage Capital to Average Assets, Amount	$ 63,074	$ 62,900
Tier 1, Leverage Capital to Average Assets, Ratio	8.51	9.60
Tier 1, Leverage Capital to Average Assets, Minimum Requirement for Capital Adequacy Purposes, Amount		$ 26,198
Tier 1, Leverage Capital to Average Assets, Minimum Requirement for Capital Adequacy Purposes, Ratio		4.00
Tier 1, Leverage Capital to Average Assets, Minimum Capital Adequacy With Capital Buffer, Amount		$ 26,198
Tier 1, Leverage Capital to Average Assets, Minimum Capital Adequacy With Capital Buffer, Ratio		4.00
Tier 1, Leverage Capital to Average Assets, Minimum Regulatory Requirements to be "Well Capitalized", Amount	$ 59,284	$ 32,747
Tier 1, Leverage Capital to Average Assets, Minimum Regulatory Requirements to be "Well Capitalized", Ratio	8.00	5.00