Note 3 - Loans and Allowance for Loan Losses - Recorded Investments in Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Principal loan balance	$ 491,266	$ 506,639
Accrued interest receivable	1,582	1,923
Net deferred loan origination fees and costs	121	317
Recorded investment in loans	492,969	508,879
Individually evaluated for impairment	3,138	3,168
Collectively evaluated for impairment	489,538	505,414
Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	293	297
Commercial Portfolio Segment [Member]
Principal loan balance	68,208	82,274
Accrued interest receivable	303	378
Net deferred loan origination fees and costs	(1,053)	(843)
Recorded investment in loans	67,458	81,809
Individually evaluated for impairment	190	211
Collectively evaluated for impairment	67,268	81,598
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	129,619	131,217
Accrued interest receivable	447	513
Net deferred loan origination fees and costs	118	120
Recorded investment in loans	130,184	131,850
Individually evaluated for impairment	1,659	1,728
Collectively evaluated for impairment	128,253	129,851
Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	272	271
Land Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member]
Principal loan balance	18,322	17,328
Accrued interest receivable	83	116
Net deferred loan origination fees and costs	15	17
Recorded investment in loans	18,420	17,461
Individually evaluated for impairment	151	97
Collectively evaluated for impairment	18,269	17,364
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	32,297	24,969
Accrued interest receivable	64	61
Net deferred loan origination fees and costs	(15)	(12)
Recorded investment in loans	32,346	25,018
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	32,346	25,018
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	132,379	135,114
Accrued interest receivable	309	435
Net deferred loan origination fees and costs	(62)	(65)
Recorded investment in loans	132,626	135,484
Individually evaluated for impairment	740	779
Collectively evaluated for impairment	131,865	134,679
Commercial Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	21	26
Home Equity and Second Mortgage [Member] \| Consumer Portfolio Segment [Member]
Principal loan balance	49,817	52,001
Accrued interest receivable	158	176
Net deferred loan origination fees and costs	1,117	1,100
Recorded investment in loans	51,092	53,277
Individually evaluated for impairment	398	353
Collectively evaluated for impairment	50,694	52,924
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	60,624	63,736
Accrued interest receivable	218	244
Net deferred loan origination fees and costs	1	0
Recorded investment in loans	60,843	63,980
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	60,843	63,980
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 http://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 http://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 http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533

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