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Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items] |  |  |  |
Nonaccrual loans/leases | $ 18,587,778 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus |  | $ 17,877,897 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus |
Troubled debt restructurings - accruing | 6,434,259 us-gaap_FinancingReceivableModificationsRecordedInvestment |  | 13,413,366 us-gaap_FinancingReceivableModificationsRecordedInvestment |
Percentage of total nonperforming loans/leases | 100.00%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans |  | 100.00%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans |
Commercial and Industrial [Member] |  |  |  |
Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items] |  |  |  |
Accruing past due 90 days or more | 822 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialAndIndustrialMember |  |  |
Nonaccrual loans/leases | 7,986,421 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialAndIndustrialMember | [1] | 1,744,981 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialAndIndustrialMember | [2]
Troubled debt restructurings - accruing | 235,926 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialAndIndustrialMember |  | 878,381 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialAndIndustrialMember |
Total nonperforming loans/leases | 8,223,169 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialAndIndustrialMember |  | 2,623,362 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialAndIndustrialMember |
Percentage of total nonperforming loans/leases | 40.91%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialAndIndustrialMember |  | 12.81%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialAndIndustrialMember |
Owner-Occupied Commercial Real Estate [Member] |  |  |  |
Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items] |  |  |  |
Accruing past due 90 days or more |  |  | 60,286 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_OwnerOccupiedCommercialRealEstateMember |
Nonaccrual loans/leases | 662,566 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_OwnerOccupiedCommercialRealEstateMember | [1] | 1,139,385 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_OwnerOccupiedCommercialRealEstateMember | [2]
Total nonperforming loans/leases | 662,566 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_OwnerOccupiedCommercialRealEstateMember |  | 1,199,671 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_OwnerOccupiedCommercialRealEstateMember |
Percentage of total nonperforming loans/leases | 3.30%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_OwnerOccupiedCommercialRealEstateMember |  | 5.86%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_OwnerOccupiedCommercialRealEstateMember |
Commercial Construction, Land Development, and Other Land [Member] |  |  |  |
Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items] |  |  |  |
Nonaccrual loans/leases | 256,012 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialConstructionLandDevelopmentAndOtherLandMember | [1] | 1,185,090 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialConstructionLandDevelopmentAndOtherLandMember | [2]
Total nonperforming loans/leases | 256,012 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialConstructionLandDevelopmentAndOtherLandMember |  | 1,185,090 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialConstructionLandDevelopmentAndOtherLandMember |
Percentage of total nonperforming loans/leases | 1.27%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialConstructionLandDevelopmentAndOtherLandMember |  | 5.79%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_CommercialConstructionLandDevelopmentAndOtherLandMember |
Non-Owner Occupied Commercial Real Estate [Member] |  |  |  |
Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items] |  |  |  |
Accruing past due 90 days or more | 60,000 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_NonOwnerOccupiedCommercialRealEstateMember |  |  |
Nonaccrual loans/leases | 6,632,038 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_NonOwnerOccupiedCommercialRealEstateMember | [1] | 10,320,491 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_NonOwnerOccupiedCommercialRealEstateMember | [2]
Troubled debt restructurings - accruing |  |  | 905,205 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_NonOwnerOccupiedCommercialRealEstateMember |
Total nonperforming loans/leases | 6,692,038 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_NonOwnerOccupiedCommercialRealEstateMember |  | 11,225,696 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_NonOwnerOccupiedCommercialRealEstateMember |
Percentage of total nonperforming loans/leases | 33.29%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_NonOwnerOccupiedCommercialRealEstateMember |  | 54.80%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_NonOwnerOccupiedCommercialRealEstateMember |
Finance Leases Portfolio Segment [Member] |  |  |  |
Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items] |  |  |  |
Nonaccrual loans/leases | 1,105,715 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_FinanceLeasesPortfolioSegmentMember | [1] | 894,458 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_FinanceLeasesPortfolioSegmentMember | [2]
Troubled debt restructurings - accruing | 233,557 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_FinanceLeasesPortfolioSegmentMember |  |  |
Total nonperforming loans/leases | 1,339,272 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_FinanceLeasesPortfolioSegmentMember |  | 894,458 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_FinanceLeasesPortfolioSegmentMember |
Percentage of total nonperforming loans/leases | 6.66%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_FinanceLeasesPortfolioSegmentMember |  | 4.37%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_FinanceLeasesPortfolioSegmentMember |
Residential Portfolio Segment [Member] |  |  |  |
Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items] |  |  |  |
Accruing past due 90 days or more | 25,673 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember |  | 20,126 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember |
Nonaccrual loans/leases | 1,299,545 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember | [1] | 1,618,483 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember | [2]
Troubled debt restructurings - accruing | 489,183 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember |  | 371,995 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember |
Total nonperforming loans/leases | 1,814,401 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember |  | 2,010,604 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember |
Percentage of total nonperforming loans/leases | 9.02%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember |  | 9.82%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember |
Consumer Portfolio Segment [Member] |  |  |  |
Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items] |  |  |  |
Accruing past due 90 days or more | 6,916 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember |  | 3,762 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember |
Nonaccrual loans/leases | 645,481 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember | [1] | 975,009 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember | [2]
Troubled debt restructurings - accruing | 462,552 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember |  | 367,000 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember |
Total nonperforming loans/leases | 1,114,949 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember |  | 1,345,771 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember |
Percentage of total nonperforming loans/leases | 5.55%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember |  | 6.57%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember |
Total [Member] |  |  |  |
Note 4 - Loans/Leases Receivable (Details) - Nonperforming Loans/Leases [Line Items] |  |  |  |
Accruing past due 90 days or more | 93,411 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember |  | 84,174 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember |
Nonaccrual loans/leases | 18,587,778 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember | [1] | 17,877,897 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember | [2]
Troubled debt restructurings - accruing | 1,421,218 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember |  | 2,522,581 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember |
Total nonperforming loans/leases | $ 20,102,407 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember |  | $ 20,484,652 qcrh_TotalNonperformingLoansLeases / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember |
Percentage of total nonperforming loans/leases | 100.00%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember |  | 100.00%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = qcrh_TotalMember |
[1] | At December 31, 2014, nonaccrual loans/leases included $5,013,041 of troubled debt restructurings, including $1,227,537 in commercial and industrial loans, $3,214,468 in commercial real estate loans, $61,144 in direct financing leases, $506,283 in residential real estate loans, and $3,609 in installment loans.
[2] | At December 31, 2013, nonaccrual loans/leases included $10,890,785 of troubled debt restructurings, including $77,072 in commercial and industrial loans, $10,077,501 in commercial real estate loans, $446,996 in residential real estate loans, and $289,216 in installment loans.

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- Definition Total nonperforming loans/leases including loans/leases accruing past due 90 days or more, loans/leases on non accrual status, and loans/leases classified as troubled debt restructurings. + References No definition available. + Details
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