Note 25 - Selected Quarterly Financial Information (unaudited) (Details) - Selected Quarterly Financial Information (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Selected Quarterly Financial Information (Unaudited) [Abstract]
Interest income	$ 4,588	$ 4,646	$ 4,663	$ 4,502	$ 4,632	$ 4,649	$ 4,554	$ 4,576	$ 18,399	$ 18,411
Interest expense	269us-gaap_InterestExpense	280us-gaap_InterestExpense	297us-gaap_InterestExpense	298us-gaap_InterestExpense	347us-gaap_InterestExpense	408us-gaap_InterestExpense	440us-gaap_InterestExpense	458us-gaap_InterestExpense	1,144us-gaap_InterestExpense	1,653us-gaap_InterestExpense
Net interest income	4,319us-gaap_InterestIncomeExpenseNet	4,366us-gaap_InterestIncomeExpenseNet	4,366us-gaap_InterestIncomeExpenseNet	4,204us-gaap_InterestIncomeExpenseNet	4,285us-gaap_InterestIncomeExpenseNet	4,241us-gaap_InterestIncomeExpenseNet	4,114us-gaap_InterestIncomeExpenseNet	4,118us-gaap_InterestIncomeExpenseNet	17,255us-gaap_InterestIncomeExpenseNet	16,758us-gaap_InterestIncomeExpenseNet
Provision for loan losses	0us-gaap_ProvisionForLoanAndLeaseLosses	75us-gaap_ProvisionForLoanAndLeaseLosses	90us-gaap_ProvisionForLoanAndLeaseLosses	25us-gaap_ProvisionForLoanAndLeaseLosses	150us-gaap_ProvisionForLoanAndLeaseLosses	100us-gaap_ProvisionForLoanAndLeaseLosses	225us-gaap_ProvisionForLoanAndLeaseLosses	250us-gaap_ProvisionForLoanAndLeaseLosses	190us-gaap_ProvisionForLoanAndLeaseLosses	725us-gaap_ProvisionForLoanAndLeaseLosses
Net interest income after provision for loan losses	4,319	4,291	4,276	4,179	4,135	4,141	3,889	3,868	17,065	16,033
Noninterest income	1,232us-gaap_NoninterestIncome	1,438us-gaap_NoninterestIncome	1,287us-gaap_NoninterestIncome	979us-gaap_NoninterestIncome	1,079us-gaap_NoninterestIncome	1,211us-gaap_NoninterestIncome	1,188us-gaap_NoninterestIncome	1,162us-gaap_NoninterestIncome	4,936us-gaap_NoninterestIncome	4,640us-gaap_NoninterestIncome
Noninterest expenses	3,843us-gaap_NoninterestExpense	3,591us-gaap_NoninterestExpense	3,349us-gaap_NoninterestExpense	3,299us-gaap_NoninterestExpense	3,433us-gaap_NoninterestExpense	3,270us-gaap_NoninterestExpense	3,306us-gaap_NoninterestExpense	3,322us-gaap_NoninterestExpense	14,082us-gaap_NoninterestExpense	13,331us-gaap_NoninterestExpense
Income before income taxes	1,708us-gaap_OperatingIncomeLoss	2,138us-gaap_OperatingIncomeLoss	2,214us-gaap_OperatingIncomeLoss	1,859us-gaap_OperatingIncomeLoss	1,781us-gaap_OperatingIncomeLoss	2,082us-gaap_OperatingIncomeLoss	1,771us-gaap_OperatingIncomeLoss	1,708us-gaap_OperatingIncomeLoss	7,919us-gaap_OperatingIncomeLoss	7,342us-gaap_OperatingIncomeLoss
Income tax expense	450us-gaap_IncomeTaxExpenseBenefit	611us-gaap_IncomeTaxExpenseBenefit	692us-gaap_IncomeTaxExpenseBenefit	559us-gaap_IncomeTaxExpenseBenefit	534us-gaap_IncomeTaxExpenseBenefit	653us-gaap_IncomeTaxExpenseBenefit	557us-gaap_IncomeTaxExpenseBenefit	511us-gaap_IncomeTaxExpenseBenefit	2,312us-gaap_IncomeTaxExpenseBenefit	2,255us-gaap_IncomeTaxExpenseBenefit
Net income	1,258us-gaap_ProfitLoss	1,527us-gaap_ProfitLoss	1,522us-gaap_ProfitLoss	1,300us-gaap_ProfitLoss	1,247us-gaap_ProfitLoss	1,429us-gaap_ProfitLoss	1,214us-gaap_ProfitLoss	1,197us-gaap_ProfitLoss	5,607us-gaap_ProfitLoss	5,087us-gaap_ProfitLoss
Less: net income attributable to noncontrolling interest in subsidiary	3	3	4	3	3	3	4	3	13	13
Net income attributable to First Capital, Inc.	$ 1,255us-gaap_NetIncomeLoss	$ 1,524us-gaap_NetIncomeLoss	$ 1,518us-gaap_NetIncomeLoss	$ 1,297us-gaap_NetIncomeLoss	$ 1,244us-gaap_NetIncomeLoss	$ 1,426us-gaap_NetIncomeLoss	$ 1,210us-gaap_NetIncomeLoss	$ 1,194us-gaap_NetIncomeLoss	$ 5,594us-gaap_NetIncomeLoss	$ 5,074us-gaap_NetIncomeLoss
Earnings per common share attributable to First Capital, Inc.:
Basic (in Dollars per share)	$ 0.45us-gaap_EarningsPerShareBasic	$ 0.56us-gaap_EarningsPerShareBasic	$ 0.55us-gaap_EarningsPerShareBasic	$ 0.47us-gaap_EarningsPerShareBasic	$ 0.45us-gaap_EarningsPerShareBasic	$ 0.51us-gaap_EarningsPerShareBasic	$ 0.43us-gaap_EarningsPerShareBasic	$ 0.43us-gaap_EarningsPerShareBasic	$ 2.03us-gaap_EarningsPerShareBasic	$ 1.82us-gaap_EarningsPerShareBasic
Diluted (in Dollars per share)	$ 0.45us-gaap_EarningsPerShareBasic	$ 0.56us-gaap_EarningsPerShareBasic	$ 0.55us-gaap_EarningsPerShareBasic	$ 0.47us-gaap_EarningsPerShareBasic	$ 0.45us-gaap_EarningsPerShareBasic	$ 0.51us-gaap_EarningsPerShareBasic	$ 0.43us-gaap_EarningsPerShareBasic	$ 0.43us-gaap_EarningsPerShareBasic	$ 2.03us-gaap_EarningsPerShareBasic	$ 1.82us-gaap_EarningsPerShareBasic

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