Debt Securities Maturity Term

No definition available.

Name:	juvf_DebtSecuritiesMaturityTerm
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Period Type:	duration

- Definition

Investment portfolio percentage.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of investment in marketable security which exceeds 10% of stockholders' equity.

+ References

No definition available.

+ Details

Name:	juvf_MarketableSecuritiesGreaterThan10PercentOfStockholdersEquity
Namespace Prefix:	juvf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478600/954-210-50-2

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147479536/321-10-50-4

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(d)(2))
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-URI https://asc.fasb.org/1943274/2147479536/321-10-50-4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-11

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash inflow from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as investing activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
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-Publisher FASB
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Data Type:	xbrli:monetaryItemType
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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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SECURITIES (Details) - USD ($)	3 Months Ended		6 Months Ended
SECURITIES (Details) - USD ($)	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Redemption of equity securities	$ 0	$ 0	$ 46,000	$ 0
Realized gain (loss) on equity securities	0	0	0	0
Change in value of equity securities	(40,000)	(9,000)	(12,000)	4,000
Carrying value of pledged assets	177,600,000		177,600,000		$ 171,500,000
Sales of debt securities available for sale	0	$ 0	0	$ 0
Equity securities	$ 1,154,000		$ 1,154,000		1,189,000
Mortgage-backed securities
Investment portfolio percentage	72.00%		72.00%
Obligations of U.S. Government sponsored enterprises
Investment portfolio percentage	19.00%		19.00%
Corporate debt securities
Investment portfolio percentage	6.00%		6.00%
Obligations of states and political subdivisions
Investment portfolio percentage	3.00%		3.00%
Debt Securities Maturity Term			5 years
Federal Farm Credit Bank
Available-for-sale and held-to-maturity securities greater than 10% of stockholders equity	$ 11,900,000		$ 11,900,000		11,600,000
Pennsylvania Housing Finance
Available-for-sale and held-to-maturity securities greater than 10% of stockholders equity					$ 4,800,000