XML 61 R50.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Acquisitions - Schedule of Consideration (Parenthetical) (Detail) - USD ($) $ in Thousands | Mar. 01, 2021 | Jul. 01, 2020
--- | --- | ---
Modernize, Inc. [Member] |  |
Business Acquisition [Line Items] |  |
Deferred Consideration Imputed Interest |  | $ 2,724
FC Ecosystem, LLC [Member] |  |
Business Acquisition [Line Items] |  |
Deferred Consideration Imputed Interest | $ 189 |

X
- Definition Deferred consideration imputed interest. + References No definition available. + Details
Name: | qnst_DeferredConsiderationImputedInterest
Namespace Prefix: | qnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=qnst_ModernizeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=qnst_FCEcosystemLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |