Stockholders' Equity and Regulatory Matters (Schedule of Compliance with Regulatory Capital Requirements) (Details) - The Juniata Valley Bank [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital, Amount	$ 65,861	$ 62,422
Total Capital, Ratio	15.85%	15.50%
Total Capital, Minimum Requirement for Capital Adequacy Purposes, Amount	$ 33,244	$ 32,222
Total Capital, Minimum Requirement for Capital Adequacy Purposes, Ratio	8.00%	8.00%
Total Capital, Minimum Capital Adequacy With Capital Buffer, Amount	$ 43,633	$ 39,774
Total Capital, Minimum Capital Adequacy With Capital Buffer, Ratio	10.50%	9.875%
Total Capital, Minimum Regulatory Requirements to be "Well Capitalized", Amount	$ 41,555	$ 40,278
Total Capital, Minimum Regulatory Requirements to be "Well Capitalized", Ratio	10.00%	10.00%
Tier 1 Capital, Amount	$ 62,900	$ 59,388
Tier 1 Capital, Ratio	15.14%	14.74%
Tier 1 Capital, Minimum Requirement for Capital Adequacy Purposes, Amount	$ 24,933	$ 24,167
Tier 1 Capital, Minimum Requirement for Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier One Risk Based Capital Minimum Capital Adequacy With Capital Buffer, Amount	$ 35,322	$ 31,719
Tier One Risk Based Capital Minimum Capital Adequacy With Capital Buffer, Ratio	8.50%	7.875%
Tier 1 Capital, Minimum Regulatory Requirements to be "Well Capitalized", Amount	$ 33,244	$ 32,222
Tier 1 Capital, Minimum Regulatory Requirements to be "Well Capitalized", Ratio	8.00%	8.00%
Common Equity Tier 1 Capital, Amount	$ 62,900	$ 59,388
Common Equity Tier 1 Capital, Ratio	15.14%	14.74%
Common Equity Tier 1 Capital, Minimum Requirement for Capital Adequacy Purposes, Amount	$ 18,700	$ 18,125
Common Equity Tier 1 Capital, Minimum Requirement for Capital Adequacy Purposes, Ratio	4.50%	4.50%
Common Equity Tier 1 Capital, Minimum Capital Adequacy With Capital Buffer, Amount	$ 29,089	$ 25,677
Common Equity Tier 1 Capital, Minimum Capital Adequacy With Capital Buffer, Ratio	7.00%	6.375%
Common Equity Tier 1 Capital, Minimum Regulatory Requirements to be "Well Capitalized", Amount	$ 27,011	$ 26,181
Common Equity Tier 1 Capital, Minimum Regulatory Requirements to be "Well Capitalized", Ratio	6.50%	6.50%
Tier 1, Leverage Capital to Average Assets, Amount	$ 62,900	$ 59,388
Tier 1, Leverage Capital to Average Assets, Ratio	9.60%	9.77%
Tier 1, Leverage Capital to Average Assets, Minimum Requirement for Capital Adequacy Purposes, Amount	$ 26,198	$ 24,317
Tier 1, Leverage Capital to Average Assets, Minimum Requirement for Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier One Risk Based Capital Minimum Capital Adequacy With Capital Buffer, Amount	$ 26,198	$ 24,317
Tier 1, Leverage Capital to Average Assets, Minimum Capital Adequacy With Capital Buffer, Ratio	4.00%	4.00%
Tier 1, Leverage Capital to Average Assets, Minimum Regulatory Requirements to be "Well Capitalized", Amount	$ 32,747	$ 30,397
Tier 1, Leverage Capital to Average Assets, Minimum Regulatory Requirements to be "Well Capitalized", Ratio	5.00%	5.00%