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Note 7 - Derivatives and Hedging Activities - Summary of Interest Rate Swaps Derivatives (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($)
Interest rate swap |
Notional Amount | $ 39,000,000
Fair Value - Liability | $ 1,151,174
Receive Rate | 4.94%
Pay Rate | 5.24%
Designated as Hedging Instrument [Member] | Other Liabilities. | Cash Flow Hedging [Member] | QCR Holdings Statutory Trust II |
Notional Amount | $ 10,000,000
Fair Value - Liability | $ 298,367
Receive Rate | 5.65%
Pay Rate | 5.85%
Designated as Hedging Instrument [Member] | Other Liabilities. | Cash Flow Hedging [Member] | QCR Holdings Statutory Trust III |
Notional Amount | $ 8,000,000
Fair Value - Liability | $ 238,693
Receive Rate | 5.65%
Pay Rate | 5.85%
Designated as Hedging Instrument [Member] | Other Liabilities. | Cash Flow Hedging [Member] | QCR Holdings Statutory Trust V |
Notional Amount | $ 10,000,000
Fair Value - Liability | $ 287,716
Receive Rate | 3.99%
Pay Rate | 4.54%
Designated as Hedging Instrument [Member] | Other Liabilities. | Cash Flow Hedging [Member] | Community National Statutory Trust II |
Notional Amount | $ 3,000,000
Fair Value - Liability | $ 89,008
Receive Rate | 4.96%
Pay Rate | 5.17%
Designated as Hedging Instrument [Member] | Other Liabilities. | Cash Flow Hedging [Member] | Community National Statutory Trust III |
Notional Amount | $ 3,500,000
Fair Value - Liability | $ 103,858
Receive Rate | 4.54%
Pay Rate | 4.75%
Designated as Hedging Instrument [Member] | Other Liabilities. | Cash Flow Hedging [Member] | Guaranty Bankshares Statutory Trust I |
Notional Amount | $ 4,500,000
Fair Value - Liability | $ 133,532
Receive Rate | 4.54%
Pay Rate | 4.75%

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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