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Segment Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenue from External Customer [Line Items]      
Total Revenue $ 776,265 $ 644,338 $ 410,926
United States      
Revenue from External Customer [Line Items]      
Total Revenue 690,000    
Internationally      
Revenue from External Customer [Line Items]      
Total Revenue 86,300    
Chegg Services      
Revenue from External Customer [Line Items]      
Total Revenue 669,894 521,228 332,221
Required Materials      
Revenue from External Customer [Line Items]      
Total Revenue $ 106,371 $ 123,110 $ 78,705