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Note 3 - LOANS LEASES RECEIVABLE - Troubled Debt Restructurings (Details) - item | Mar. 31, 2022 | Mar. 31, 2021
--- | --- | ---
LOANS/LEASES RECEIVABLE |  |
Number of loans restructured | 0 | 0

X
- Definition The number of loans restructured during the period. + References No definition available. + Details
Name: | qcrh_NumberOfLoansRestructured
Namespace Prefix: | qcrh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration