Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total net revenues	$ 131,590	$ 97,409
Change in total net revenues	$ 34,181
Change in total net revenues, percent	35.00%
Contract with customer, liability, revenue recognized	$ 17,500	12,400
Aggregate amount of unsatisfied performance obligations	35,800
Accounts receivable, net	6,493		$ 11,529
Change in accounts receivable	$ (5,036)
Change in accounts receivable, percent	(44.00%)
Deferred revenue	$ 35,753		18,780
Change in deferred revenue	$ 16,973
Change in deferred revenue, percent	90.00%
Contract assets	$ 4,482		$ 3,531
Change in contract assets	$ 951
Change in contract assets, percent	27.00%
Textbook Library
Disaggregation of Revenue [Line Items]
Operating Lease, Lease Income	$ 12,300
Chegg Services
Disaggregation of Revenue [Line Items]
Total net revenues	100,359	75,292
Change in total net revenues	$ 25,067
Change in total net revenues, percent	33.00%
Required Materials
Disaggregation of Revenue [Line Items]
Total net revenues	$ 31,231	$ 22,117
Change in total net revenues	$ 9,114
Change in total net revenues, percent	41.00%