Juniata Valley Financial Corp. (Parent Company Only) Financial Information (Schedule of Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash and cash equivalents	$ 12,740	$ 16,456
Equity securities	1,144	1,118
Debt securities available for sale	210,686	141,953
Total assets	670,632	625,236
Stockholders' equity	73,707	67,378	$ 59,387
Total liabilities and stockholders' equity	670,632	625,236
Parent Company [Member]
Cash and cash equivalents	80	48
Investment in bank subsidiary	72,353	65,909
Equity securities	947	940
Debt securities available for sale	253	253
Other assets	99	641
Total assets	73,732	67,791
Accounts payable and other liabilities	25	413
Stockholders' equity	73,707	67,378
Total liabilities and stockholders' equity	$ 73,732	$ 67,791