Note 18 - Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Community bank leverage, amount	$ 98,869	$ 89,737
Community bank leverage ratio, actual ratio	0.0884	0.0937
Community Bank Leverage Ratio	$ 95,040	$ 76,579
Community Bank Leverage Ratio	0.0850	0.0800

Ratio of minimum community banking leverage capital to average assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.

No definition available.

Name:	fcap_CommunityBankingRegulationLeverageCapitalRatioWellCapitalizedMinimum
Namespace Prefix:	fcap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant