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Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net revenues	$ 776,265	$ 644,338	$ 410,926
Change in total net revenues	$ 131,927	$ 233,412
Change in total net revenues, percent	20.00%	57.00%
Chegg Services
Disaggregation of Revenue [Line Items]
Net revenues	$ 669,894	$ 521,228	332,221
Change in total net revenues	$ 148,666	$ 189,007
Change in total net revenues, percent	29.00%	57.00%
Required Materials
Disaggregation of Revenue [Line Items]
Net revenues	$ 106,371	$ 123,110	$ 78,705
Change in total net revenues	$ (16,739)	$ 44,405
Change in total net revenues, percent	(14.00%)	56.00%

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