XML 50 R44.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Acquisitions - Schedule of Consideration (Parenthetical) (Detail) - USD ($) $ in Thousands	May 14, 2019	Apr. 15, 2019	Oct. 01, 2018
AmOne Corp [Member]
Business Acquisition [Line Items]
Post-closing payments, imputed interest			$ 486
CloudControlMedia, LLC [Member]
Business Acquisition [Line Items]
Post-closing payments, imputed interest		$ 829
MyBankTracker.com, LLC [Member]
Business Acquisition [Line Items]
Post-closing payments, imputed interest	$ 292

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_AmOneCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=qnst_CloudControlMediaLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=qnst_MyBankTrackerComLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: