Juniata Valley Financial Corp. (Parent Company Only) Financial Information (Schedule of Condensed Statements of Cash Flows) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 5,835,000	$ 5,904,000
Net realized loss on sales and calls of available for sale securities	43,000	188,000
Income/gain from unconsolidated subsidiary, net of dividends of $0 and $75, respectively		194,000
Equity gain from acquisition of unconsolidated subsidiary		(415,000)
Stock-based compensation expense	113,000	82,000
Net cash provided by operating activities	9,941,000	5,321,000
Purchases of: Securities available for sale	(125,422,000)	(20,610,000)
Proceeds from: Sales of securities available for sale	21,777,000	10,461,000
Proceeds from the maturity and principal repayments of available for sale investment securities	38,056,000	19,145,000
Net cash received from acquisition		7,561,000
Net cash (used in) provided by investing activities	(47,968,000)	14,835,000
Cash dividends	(4,489,000)	(4,411,000)
Purchase of treasury stock	(428,000)	(70,000)
Treasury stock issued for stock plans	400,000	90,000
Common stock issued for stock plans		42,000
Net cash provided by (used in) financing activities	34,311,000	(13,597,000)
Net (decrease) increase in cash and cash equivalents	(3,716,000)	6,559,000
Cash and cash equivalents at beginning of year	16,456,000	9,897,000
Cash and cash equivalents at end of period	12,740,000	16,456,000
Equity method investment, dividends	0	75,000
Parent Company [Member]
Net income	5,835,000	5,904,000
Undistributed net gain of subsidiary	(1,432,000)	(556,000)
Change in equity security value	(8,000)	(26,000)
Income/gain from unconsolidated subsidiary, net of dividends of $0 and $75, respectively		194,000
Equity gain from acquisition of unconsolidated subsidiary		(415,000)
Stock-based compensation expense	113,000	82,000
Decrease (increase) in other assets	429,000	(93,000)
Decrease in taxes payable	(402,000)	(402,000)
Increase (decrease) in accounts payable and other liabilities	14,000	(12,000)
Net cash provided by operating activities	4,549,000	4,676,000
Net cash received from acquisition		(1,361,000)
Net cash (used in) provided by investing activities		(1,361,000)
Cash dividends	(4,489,000)	(4,411,000)
Purchase of treasury stock	(428,000)	(70,000)
Treasury stock issued for stock plans	400,000	90,000
Common stock issued for stock plans		42,000
Net cash provided by (used in) financing activities	(4,517,000)	(4,349,000)
Net (decrease) increase in cash and cash equivalents	32,000	(1,034,000)
Cash and cash equivalents at beginning of year	48,000	1,082,000
Cash and cash equivalents at end of period	80,000	48,000
Equity method investment, dividends	$ 0	$ 75,000