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Document and Entity Information
Nov. 03, 2021
Cover [Abstract]  
Entity Registrant Name QUINSTREET, INC
Amendment Flag false
Entity Central Index Key 0001117297
Document Type 8-K
Document Period End Date Nov. 03, 2021
Entity Incorporation State Country Code DE
Entity File Number 001-34628
Entity Tax Identification Number 77-0512121
Entity Address Address Line1 950 Tower Lane
Entity Address, Address Line Two 6th Floor
Entity Address City Or Town Foster City
Entity Address State Or Province CA
Entity Address Postal Zip Code 94404
City Area Code (650)
Local Phone Number 578-7700
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.001 per share
Trading Symbol QNST
Security Exchange Name NASDAQ
Entity Emerging Growth Company false