Note 3 - Loans and Allowance for Loan Losses - Recorded Investments in Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Principal loan balance	$ 532,527	$ 488,246
Accrued interest receivable	1,546	1,460
Net deferred loan origination fees and costs	1,176	1,124
Recorded investment in loans	535,249	490,830
Individually evaluated for impairment	2,058	2,315
Collectively evaluated for impairment	532,920	488,234
Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	271	281
Commercial Portfolio Segment [Member]
Principal loan balance	56,055	51,787
Accrued interest receivable	209	180
Net deferred loan origination fees and costs	(19)	(46)
Recorded investment in loans	56,245	51,921
Individually evaluated for impairment	158	174
Collectively evaluated for impairment	56,087	51,747
Commercial Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member]
Principal loan balance	142,849	130,603
Accrued interest receivable	451	442
Net deferred loan origination fees and costs	103	107
Recorded investment in loans	143,403	131,152
Individually evaluated for impairment	916	1,034
Collectively evaluated for impairment	142,219	129,848
Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	268	270
Land Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member]
Principal loan balance	19,552	19,478
Accrued interest receivable	109	103
Net deferred loan origination fees and costs	13	13
Recorded investment in loans	19,674	19,594
Individually evaluated for impairment	50	102
Collectively evaluated for impairment	19,624	19,492
Land Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Construction Loans [Member] \| Real Estate Mortgage Portfolio Segment [Member]
Principal loan balance	40,101	33,439
Accrued interest receivable	86	67
Net deferred loan origination fees and costs	(13)	(15)
Recorded investment in loans	40,174	33,491
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	40,174	33,491
Construction Loans [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Commercial Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member]
Principal loan balance	154,046	137,915
Accrued interest receivable	296	290
Net deferred loan origination fees and costs	(76)	(64)
Recorded investment in loans	154,266	138,141
Individually evaluated for impairment	580	702
Collectively evaluated for impairment	153,683	137,428
Commercial Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	3	11
Home Equity and Second Mortgage [Member] \| Consumer Portfolio Segment [Member]
Principal loan balance	58,213	54,453
Accrued interest receivable	195	160
Net deferred loan origination fees and costs	1,168	1,129
Recorded investment in loans	59,576	55,742
Individually evaluated for impairment	354	303
Collectively evaluated for impairment	59,222	55,439
Home Equity and Second Mortgage [Member] \| Consumer Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Other Consumer Loan [Member] \| Consumer Portfolio Segment [Member]
Principal loan balance	61,711	60,571
Accrued interest receivable	200	218
Net deferred loan origination fees and costs	0	0
Recorded investment in loans	61,911	60,789
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	61,911	60,789
Other Consumer Loan [Member] \| Consumer Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	$ 0	$ 0

Represents loans and leases receivable accrued interest.

No definition available.

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Namespace Prefix:	fcap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the loans and leases receivable principal balance.

+ References

No definition available.

+ Details

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- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

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- Definition

Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533

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