XML 12 R1.htm IDEA: XBRL DOCUMENT v3.22.2.2
Document and Entity Information - USD ($)
12 Months Ended
Jun. 30, 2022
Aug. 15, 2022
Dec. 31, 2021
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jun. 30, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Trading Symbol QNST    
Entity Registrant Name QuinStreet, Inc.    
Entity Central Index Key 0001117297    
Current Fiscal Year End Date --06-30    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   53,382,715  
Entity Public Float     $ 949,884,910
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity File Number 001-34628    
Entity Tax Identification Number 77-0512121    
Entity Address, Address Line One 950 Tower Lane    
Entity Address, Address Line Two 6th Floor    
Entity Address, City or Town Foster City    
Entity Address, State or Province CA    
Entity Incorporation State Country Code DE    
Entity Address, Postal Zip Code 94404    
City Area Code 650    
Local Phone Number 587-7700    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Security Exchange Name NASDAQ    
Documents Incorporated by Reference Portions of the registrant’s definitive proxy statement relating to its 2022 annual stockholders’ meeting are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Location San Francisco, California    
Auditor Firm ID 238