XML 109 R95.htm IDEA: XBRL DOCUMENT v3.20.4
Segment Information - Revenue by Product Line (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue from External Customer [Line Items]                      
Total Revenue $ 205,721 $ 154,018 $ 153,009 $ 131,590 $ 125,504 $ 94,151 $ 93,862 $ 97,409 $ 644,338 $ 410,926 $ 321,084
Chegg Services                      
Revenue from External Customer [Line Items]                      
Total Revenue                 521,228 332,221 253,985
Required Materials                      
Revenue from External Customer [Line Items]                      
Total Revenue                 $ 123,110 $ 78,705 $ 67,099