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Divestitures - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 31, 2020 | Apr. 30, 2020 | Feb. 14, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Proceeds from divestitures of businesses, net of cash divested | $ 20,000 | $ 3,300 |  |  |  |  | $ 21,947 | $ 11,105
Purchase price of agreement |  |  | $ 12,900 |  |  |  |  |
Proceeds from sale of business |  |  | 10,000 |  |  |  |  |
QuinStreet Brasil Online Marketing e Midia Ltda ("QSB") and VEMM, LLC ("VEMM") | Euro-Demand Do Brasil Serviços de Geração de Leads Ltda (“EDB”) |  |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Proceeds from sale of business |  |  |  |  |  | $ 1,100 |  |
Secured Promissory Note |  |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Secured promissory note, receivable |  |  | $ 2,900 |  |  |  |  |
Other Income (Expense) |  |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Gain (loss) on disposition of operation |  |  |  | $ 16,600 | $ 2,800 | $ 12,000 |  |

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